The medical management of missed miscarriage: outcomes from a prospective, single-centre, Australian cohort

Scott G Petersen, Anneliese R Perkins, Kristen S Gibbons, Julia I Bertolone and Kassam Mahomed
Med J Aust 2013; 199 (5): 341-346. || doi: 10.5694/mja12.11813
Published online: 2 September 2013


Objective: To report the prospective outcomes of medical management of missed miscarriage before 13 weeks' gestation from an Australian cohort.

Design: Descriptive study of a cohort selected out of a randomised controlled trial.

Setting: Outpatient management at a maternity hospital between 1 May 2007 and 28 July 2010.

Participants: 264 women requesting medical management of missed miscarriage.

Main outcome measures: Number of doses of misoprostol required, unscheduled visits for care, findings at ultrasound follow-up, requirement for surgical management, number of cases of gestational trophoblastic disease (GTD), and self-reported patient experience.

Results: 107 women (40.5%) received a repeat dose of misoprostol, and 79 women (29.9%) made unscheduled visits for care. Among the 241 women with Day 7 ultrasound follow-up, a gestational sac was found in 32 women (13.3%), indicating failure of medical management. Complete miscarriage was induced without the need for surgery in 206 women (78.0%). Surgery was performed as an emergency in 13 women (4.9%). Twelve women (4.5%) had surgery for ongoing bleeding after medical management, and four of these did not have chorionic villi on histopathological examination. Five women (1.9%) had GTD, which was managed incidentally under the protocol. Among those who returned patient questionnaires, 73.0% participants (116/159) indicated that they would recommend medical management of miscarriage to other women, while 18.2% (29/159) indicated that they would undergo surgery next time.

Conclusion: The medical management of missed miscarriage on an outpatient basis is safe and effective.

Trial registration: ACTRN12612000150842.

The medical management of miscarriage involves administering a medication to induce complete miscarriage. Misoprostol is the medication recommended for this purpose, despite this use being “off-label”.1,2 Most commonly indicated for missed miscarriage,3,4 medical management has been demonstrated to effectively expedite evacuation of the uterus compared with expectant management and safely reduce the need for surgical management.5,6 High rates of satisfaction have been reported with medical management.3,7

Despite clinical trials showing that medical management is an acceptable alternative to surgical management,3-8 it has not been widely implemented into clinical practice in Australia. Until recently, the reported clinical experience in Australia was limited to one randomised trial involving 12 women with incomplete or inevitable miscarriages.9 This trial comparing all three methods of managing miscarriage was stopped because of poor support, with only 22% of eligible women recruited. A survey of general practitioners in reported that 48% were aware of pharmacological methods of managing miscarriage and only 8% had experience with medical management.10

We report the prospective clinical outcomes and patient experience after the medical management of missed miscarriage on an outpatient basis at a single Australian hospital.


We performed a descriptive study to evaluate a protocol for the medical management of missed miscarriage between 6 weeks and 12 weeks, 6 days of gestation, implemented at the Mater Mothers' Hospital, . The study cohort consisted of women managed under this protocol from 1 May 2007 to 28 July 2010. The study was approved by the Mater Health Services Human Research Ethics Committee.

Participants were selected from a randomised controlled trial (RCT) (ACTRN12612000150842) conducted over two study sites, which compared 400 µg and 800 µg doses of misoprostol administered intravaginally in the outpatient management of miscarriage.11 This study enrolled 310 women, including 27 with incomplete and 283 with missed miscarriage. The trial showed equivalence between the two doses for the induction of complete miscarriage.

The protocol has been described previously in detail.11 Missed miscarriage was defined by the presence of an intrauterine gestational sac (GS) with or without a fetal pole at ultrasound assessment, irrespective of the indication for the scan. Gestational age was calculated with certain menstrual dates, or if unknown, ultrasound criteria.

Women requesting medical management were treated as outpatients at the gynaecology department. Misoprostol (400 µg or 800 µg) was administered intravaginally before discharge home into the care of a responsible adult. Written information about what to expect and a script for analgesia (paracetamol with codeine, and ibuprofen) were provided. Rhesus-negative women were administered 625 IU of rhesus D immunoglobulin intramuscularly. All women were encouraged to collect any tissue passed for histopathological examination.

Clinical follow-up was arranged for the next day (Day 1), Day 3, Day 7 and at 6 weeks. The dose of misoprostol given at presentation was repeated the next day if the products of conception had not been passed. A transvaginal ultrasound scan (TVUSS) was arranged for Day 7. On Day 3 and at 6 weeks, all women were given questionnaires about patient experience and satisfaction. Planned follow-up was to be completed at 6 weeks if results of a urine test for β-human chorionic gonadotropin (βhCG) were negative. Further follow-up was at the discretion of the attending gynaecologist.

Miscarriage completion was evaluated by gynaecologists on the basis of clinical assessment and the findings of the Day 7 TVUSS. Under the protocol, the miscarriage was considered complete without the need for surgery if there was a negative result of a urine βhCG test and a spontaneous return to a normal menstrual cycle. Criteria defining failure of medical management at the Day 7 TVUSS were used to guide decision making about surgical management.3 The TVUSS criteria indicating surgery were a persistent intrauterine GS or an endometrial thickness greater than 30 mm. Clinical indications for surgery before the Day 7 TVUSS included excessive bleeding or pain causing haemodynamic compromise, suspected sepsis or patient request. The decision to perform surgery for retained products of conception (RPOC) at any time during follow-up when there was persistent or abnormal vaginal bleeding was made pragmatically by consultant gynaecologists. Surgical evacuation of the uterus was performed by suction aspiration. Histopathological examination of all specimens was recommended to confirm the presence of chorionic villi, and to exclude gestational trophoblastic disease (GTD) and chronic endometritis. Results were reported as negative for RPOC if chorionic villi were not found after examination of the entire specimen. The medical charts and any related imaging and pathology reports of all women were reviewed and returned patient questionnaires were analysed to document clinical outcomes and patient experience.

Statistical analysis

Statistical significance was determined for categorical variables with the Fisher exact test or χ2 test, and for continuous variables with standard parameteric or non-parametric tests (as determined by the number of groups analysed). P less than 0.05 was considered clinically significant. Statistical analysis was performed with GraphPad Prism version 5.0.


A total of 264 women with missed miscarriage were treated. At presentation, 136 (51.5%) received the 400 µg and 128 (48.5%) received the 800 µg dose of misoprostol. The characteristics of the study population are given in Box 1. The Day 7 TVUSS was performed in 241 (91.3%) women; 23 women did not have the TVUSS (15 underwent surgery; eight did not attend). Clinical follow-up to complete miscarriage or surgery was completed in all 264 women. Box 1 summarises the number of doses and unscheduled visits for care, Day 7 TVUSS outcomes and surgical management. Outcomes matched to the Day 7 TVUSS findings are described in Box 2.

Day 7 TVUSS findings

A GS was found in 32 women on median Day 7 (range, Day 6–12). No GS was identified in 209 women on median Day 7 (range, Day 1–21), and four of these had endometrial thickness > 30 mm (range, 34–45 mm on Days 6–7). Overall, 36 of the women who had TVUSS (14.9%) met the criteria for failure of medical management.

Surgical management

Surgery was performed in 58 women (22.0%). Emergency surgery was performed in 13 women for clinical indications. Two women requested surgery before Day 7. Of the 36 women with TVUSS criteria for failure, 31 (86.1%) underwent surgery. Initially, nine continued conservative management and five of these (four with GS and one with endometrial thickness > 30 mm) completed the miscarriage without surgery by 6 weeks — four continued expectantly, and one requested a repeat course of misoprostol. Of the 205 women with no TVUSS criteria for failure, 12 (5.9%) underwent surgery for clinically suspected RPOC on median Day 46 (range, Day 20–98).

Number of doses

One hundred and seven women (40.5%) received a repeat dose of misoprostol. If a repeat dose was required, the rate of failure using TVUSS criteria was significantly higher (15/140 [10.7%] with one dose v 21/101 [20.8%] with a repeat dose; P = 0.04). There was no difference in the rate of surgery (32/157 [20.4%] with one dose v 26/107 [24.3%] with a repeat dose; P = 0.45). Of the 13 women undergoing emergency surgery, three had a repeat dose.

Unscheduled visits for care

Seventy-nine women (29.9%) made 86 unscheduled visits for care, with five women making two presentations and one woman presenting three times. Of these visits, 55 were acute presentations to hospital emergency departments and 31 were non-urgent reviews.

The acute presentations occurred on median Day 1 (interquartile range [IQR], Day 0–4; maximum, Day 23) and were related to miscarriage symptoms (pain and bleeding). These presentations led to admission for 21 women, with 10 undergoing emergency surgery and two requiring blood transfusions (one of 1 unit and one of 2 units). Four women were observed overnight in emergency departments.

The non-urgent reviews occurred on median Day 26 (IQR, Day 19–57; maximum, Day 97), and were related to abnormal bleeding, including two women who required postsurgical management. Of these 31 presentations, 15 were managed conservatively and 16 surgically, including four women with TVUSS criteria for failure who initially continued conservatively. Nine women were treated with antibiotics for suspected infection.

Patient experience and satisfaction

A total of 199 women (75.4%) returned questionnaires (Box 3), but not all questions were answered (hence denominators vary). Fifty-three per cent of respondents (80/151) reported passing products of conception within 24 hours of receiving misoprostol. Seventy-nine women reported on the number of days of bleeding, with the median being 10 days (IQR, 6–14 days; maximum, 56 days). Among those who reported the approximate duration of bleeding, 23.2% (35/151) reported bleeding for longer than 2 weeks. With regard to bleeding amount and pain severity, 32.8% (60/183) reported heavier bleeding than expected and 42.8% (77/180) reported experiencing more severe pain than expected.

When asked if they would recommend medical management of miscarriage to other women, 73.0% (116/159) indicated that they would, while 18.2% (29/159) indicated that they would undergo surgery next time. Patient satisfaction is reported with Likert scales in Box 4.

Histopathological examination

One hundred and nine specimens from 104 pregnancies (39.4%) were examined. Of the 206 women who did not have surgery, 47 (22.8%) provided samples; chorionic villi were confirmed in all of these samples. After surgery, chorionic villi were not identified in specimens from five women: one specimen was collected at emergency surgery for heavy bleeding on Day 3, and the other four were collected at surgery for suspected RPOC between Days 44 and 98. Each of these four women had a negative βhCG test result before surgery. Chronic endometritis was reported in two of these women.

Five cases of GTD were identified on histopathological examination, including one complete and four partial molar pregnancies. Three cases were identified at surgery: two cases in women having surgery for failed medical management indicated by presence of a GS; and one in a woman having surgery for suspected RPOC on Day 62 with a positive βhCG urine test result. Two cases were identified on examination of spontaneously passed tissue, and were managed conservatively without surgery. Chemotherapy was not required in any of the women. Serum βhCG test results were negative (βhCG level < 1.2 IU) by Day 50–55 in the two managed without surgery, and by Day 75–101 in those who had surgery.


Our initial experience with the medical management of missed miscarriage is consistent with the published literature.3-8,12 Our results support offering medical management to women on an outpatient basis, and confirm that this form of management can be safely implemented into clinical practice.

Similar to other clinical studies,3,12 we report that the rate of failure using TVUSS criteria is higher if a repeat dose is required. Increased rates of failure with medical management have also been reported with delaying management after diagnosis and nulliparity.13,14 This suggests that factors unique to the index pregnancy, including myometrial receptivity, and not the treatment itself, may account for failure. Our study was not powered for a post-hoc secondary analysis of failed medical management. Miscarriage symptoms within 24 hours of treatment may increase success.14 Others have reported that prior caesarean delivery did not affect outcome.15

Our RCT involving this cohort showed that the dose of misoprostol used appears not to affect the rate of complete miscarriage; however, using a higher dose does increase the rate of fever or rigors experienced despite a reduced need for repeat administration.11

We provided written information and arranged frequent follow-up for our patients. Despite this, over one-quarter made unscheduled visits for care. Miscarriage symptoms are a common reason for presentation to emergency departments, and are also frequent after surgical management. Previous studies have reported unscheduled visits in 18%–23% of patients after medical management and 8%–17% after surgery.3,4

Most unscheduled presentations following medical management can be managed conservatively.1 Less than 10% of our cohort required acute admission to hospital and the rate of emergency surgery within 1 week was 4.9%. This suggests that most women present seeking reassurance that the miscarriage symptoms they are experiencing are appropriate. Management on an outpatient basis may have contributed to this, with one-third indicating that they would have preferred hospital admission and one-quarter reporting that their emotional stress was increased by outpatient management.

While experiencing pain and bleeding during miscarriage may negatively affect the acceptability of medical management,16 the method of miscarriage management has not been reported to affect psychological morbidity.17 The duration of bleeding is accepted to be longer after medical management than after surgery; however, the duration of pain and convalescence, transfusion requirement, and risk of infection and future fertility complications are not increased.3,4,6,18 Surgery requires anaesthesia and carries unique risks, such as cervical injury and uterine perforation. It has been reported that women would prefer medical over surgical management if the effectiveness of medical management to induce complete miscarriage exceeded 65%.19

The use of a single dose of misoprostol, repeated as clinically indicated, safely reduces but does not obviate the need for surgery.3,8 Surgery remains the principal management for miscarriages complicated by haemodynamic compromise from excessive bleeding, sepsis or (suspected) GTD.1 Complications indicating surgical management are considered to affect less than 10% of miscarriages.16 Surgery should remain available electively to women who prefer that option.

Ultrasound evaluation of treatment success after medical management is standard practice,3,4,7,8 although a correlation between endometrial thickness and the need for surgical management is disputed.20 We adopted published ultrasound criteria to guide our clinicians on the need for surgical management.3 Just over half of the surgical patients in our study met TVUSS criteria for failure.

Previous studies have restricted the evaluation of surgical management during follow-up to specified time frames after treatment with misoprostol,3,7 or to confirmation of chorionic villi at histopathological examination.7 We included all surgical patients and evaluated histopathological results in an attempt to differentiate women with RPOC from those with abnormal uterine bleeding.20 Of the 12 women who underwent surgery for suspected RPOC, chorionic villi were not confirmed in four. Given that two had features of chronic endometritis and none had a significant βhCG level before surgery, the ongoing bleeding in these four women suggests failure to return to an ovulatory cycle, rather than failure of medical management.

The routine pathological examination of tissue evacuated from the uterus to exclude an ectopic pregnancy or GTD has been challenged.21 While ultrasound is a powerful tool in the assessment of pregnancy location, differentiating a molar pregnancy from a failed early pregnancy remains difficult.22,23 In our cohort, five molar pregnancies were identified coincidentally out of 104 (4.8%) on histopathological examination. Although the rate in our total cohort was undetermined, the incidence of hydatidiform molar pregnancies reported in a study of 1606 uncomplicated miscarriages managed surgically was 2.5%.24 Even after apparently successful medical management, clinicians must remain vigilant to not miss signs of GTD.25

The medical management of missed miscarriage on an outpatient basis is clinically effective, safe and acceptable. Medical management reduces the need for surgery and can be routinely offered in cases of uncomplicated missed miscarriage. Consideration should be given to routinely performing a urine pregnancy test during follow-up after 6 weeks. Failure to return to normal menstruation with ongoing abnormal bleeding and persistence of a positive result of a serum βhCG test warrants gynaecological review and consideration for surgical management to exclude GTD.

1 Characteristics and clinical outcomes of 264 women undergoing medical management of missed miscarriage*


No. of misoprostol doses

Day 7 TVUSS findings

Surgical management

Unscheduled visits for care


Total (n = 264†)

One dose (n = 157)

Repeat dose (n = 107)

GS present (n = 32)

No GS (n = 209)

Emergency or requested (n = 15)

Day 7 TVUSS criteria for failure (n = 31)

Clinically suspected RPOC (n = 12)

No surgery (n = 206)

Acute presentation (n = 55)

No acute presentation (n = 209)

Maternal characteristics


Mean age in years (SD)

31.4 (5.8)

31.4 (5.9)

31.4 (5.7)

32.8 (5.9)

31.5 (5.9)

30.2 (3.7)

32.1 (6.1)

31.2 (4.4)

31.4 (6.0)

30.5 (6.1)

31.6 (5.7)

Median gravida (range)

2 (1–13)

2 (1–13)

2 (1–13)

2 (1–10)

2 (1–13)

2 (1–6)

2 (1–10)

2 (1–6)

2 (1–13)

2 (1–13)

2 (1–13)


118 (44.7%)

67 (42.7%)

51 (47.7%)

15 (46.9%)

96 (45.9%)

5 (33.3%)

15 (48.4%)

5 (41.7%)

93 (45.1%)

19 (34.5%)

99 (47.4%)

Prior caesarean section‡

51/262 (19.5%)

33/156 (21.2%)

16/106 (15.1%)

4/31 (12.9%)

41/208 (19.7%)

3/15 (20.0%)

4/31 (12.9%)

7/12 (58.3%)

37/204 (18.1%)

15/54 (27.8%)

34/208 (16.3%)

Pregnancy characteristics of miscarriage


Mean gestational age in weeks (SD)

9.7 (2.5)

9.7 (2.5)

9.7 (2.4)

9.6 (2.5)

9.7 (2.5)

9.9 (2.4)

9.7 (2.6)

10.3 (2.1)

9.6 (2.5)


9.5 (2.4)

Fetal pole present‡

126/173 (72.8%)

79/104 (76.0%)

47/69 (68.1%)

17/22 (77.3%)

96/134 (71.6%)

13/17 (76.5%)

16/21 (76.2%)

5/10 (50.0%)

92/125 (73.6%)

30/40 (75.0%)

96/133 (72.2%)

Clinical management characteristics


Median days to treatment (range)

0 (0–26)

0 (0–26)

0 (0–21)

0 (0–26)

0 (0–21)

0 (0–2)

0 (0–26)

0 (0–9)

0 (0–21)

0 (0–13)

0 (0–26)

800 µg misoprostol dose

128 (48.5%)

85 (54.1%)

43 (40.2%)

12 (37.5%)

106 (50.7%)

7 (46.7%)

11 (35.5%)

7 (58.3%)

103 (50.0%)

26 (47.3%)

102 (48.8%)

Second misoprostol dose

107 (40.5%)

17 (53.1%)

84 (40.2%)

5 (33.3%)

18 (58.1%)

3 (25.0%)

81 (39.3%)

11 (20.0%)

96 (45.9%)

GS = gestational sac. RPOC = retained products of conception. TVUSS = transvaginal ultrasound scan. * An exploratory secondary analysis was performed to assess for associations between patient characteristics and each of the four clinical outcomes. P > 0.05 was recorded for all analyses, except number of doses and 800 µg dose (P = 0.033) and surgical management and prior caesarean section (P = 0.006). † Seven women with recurrent miscarriages were managed twice under the protocol. ‡ Incomplete dataset for prior caesarean section (data for 262 women) and fetal pole present (data for 173 women). No difference was identified for prior caesarean section on analysis of all women undergoing surgical management compared with no surgical management (24.1% v 18.1%; P = 0.348).

2 Clinical outcomes matched to the Day 7 transvaginal ultrasound scan (TVUSS) findings of 264 women undergoing medical management of missed miscarriage

TVUSS findings

Total (n = 264)

Repeat dose (n = 107)

Unscheduled visits for care (n = 73)

Surgical management (n = 58)

Median days to surgery (range) (n = 58)

No chorionic villi on histopathological examination (n = 5)

Gestational trophoblastic disease (n = 5)

Successful medical management


No GS present; ET ≤ 30 mm

205 (77.7%)

80 (74.8%)

54 (74.0%)

12* (20.7%)

46 (20–98)

4* (80.0%)

3 (60.0%)

Failure of medical management


No GS present; ET > 30 mm

4 (1.5%)

4 (3.7%)

2 (2.7%)

3 (5.2%)

22 (9–41)



GS present

32 (12.1%)

17 (15.9%)

4 (5.5%)

28 (48.3%)

10 (7–37)


2 (40.0%)

Unknown (no TVUSS)

23 (8.7%)

6 (5.6%)

13 (17.8%)

15† (25.9%)

4 (0–10)

1 (20.0%)


GS = gestational sac. ET = endometrial thickness. * Among the 12 women managed surgically after successful medical management, there was no significant difference in ET between the four women with no chorionic villi (median, 12.15 mm; range, 2.0–26.4 mm) and the eight women with confirmed chorionic villi (median, 18.75 mm; range, 5.8–27.0 mm; P = 0.368) on histopathological examination. There was also no significant difference in days to surgery between those with no chorionic villi (median, 57; range, 44–98) and those with confirmed chorionic villi (median, 42; range, 20–77; P = 0.174). † Of the 15 women managed surgically who had unknown TVUSS characteristics, 13 had emergency surgery (surgery was arranged for three women at scheduled follow-up and for 10 at unscheduled visits), and two requested surgery.

3 Patient experiences of medical management of missed miscarriage*

Questions and responses

No. of women (%)

Miscarriage — time to onset of symptoms (fresh bleeding or pain) (n = 190)

Several hours

127 (66.8%)

< 24 hours

47 (24.7%)

< 48 hours

12 (6.3%)


4 (2.1%)

Miscarriage — time to pass products of conception (n = 151)

< 24 hours

80 (53.0%)

< 48 hours

28 (18.5%)

After 3 days

21 (13.9%)

Not after 1 week

22 (14.6%)

Bleeding — enough to worry (n = 192)


70 (36.5%)


122 (63.5%)

Bleeding — amount compared with expectations (n = 183)

Much more than expected

10 (5.5%)

More than expected

50 (27.3%)


69 (37.7%)

Less than expected

54 (29.5%)

Bleeding — duration (n = 151)

Longer than 2 weeks

35 (23.2%)

Longer than a period

68 (45.0%)


28 (18.5%)

Less than a period

20 (13.2%)

Pain — enough to worry (n = 193)


89 (46.1%)


104 (53.9%)

Pain — severity compared with expectations (n = 180)

Much more than expected

23 (12.8%)

More than expected

54 (30.0%)


56 (31.1%)

Less than expected

47 (26.1%)

Satisfaction — felt it was a good decision to undergo medical management (n = 156)


131 (84.0%)


25 (16.0%)

Satisfaction — received appropriate information about miscarriage symptoms (n = 158)


142 (89.9%)


16 (10.1%)

Satisfaction — received appropriate information about management at home (n = 158)


137 (86.7%)


21 (13.3%)

Satisfaction — would have preferred hospital admission (n = 156)


50 (32.1%)


106 (67.9%)

Emotional stress — increased by outpatient management (n = 153)


40 (26.1%)


113 (73.9%)

Emotional stress — increased by awaiting effect of medical management (n = 159)


41 (25.8%)


118 (74.2%)

* 199 women returned questionnaires; totals vary because not all questions were answered by all respondents.

4 Patient satisfaction with medical management of missed miscarriage, from 199 returned questionnaires

Received 13 December 2012, accepted 30 May 2013

  • Scott G Petersen1
  • Anneliese R Perkins1
  • Kristen S Gibbons2
  • Julia I Bertolone1
  • Kassam Mahomed2,3

  • 1 Mater Mothers’ Hospital, Brisbane, QLD.
  • 2 Mater Medical Research Institute, Brisbane, QLD.
  • 3 Ipswich Hospital, Brisbane, QLD.


We are grateful to all the registrars, consultants and nursing staff who assisted with recruitment into the study and management of the participating women at the Mater Mothers' Hospital. We acknowledge the Mater Research Support Centre for their support and encouragement.

Competing interests:

No relevant disclosures.

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