Secondary Infertility due to Fetal Bone Retention A systematic literature review

Prolonged intrauterine retention of fetal bones during an abortion procedure can lead to secondary infertility. This review aimed to raise awareness among obstetric/gynaecologists about the possibility of this condition. A total of 17 case reports, seven case series and one retrospective study were included in this review, with 75 patients in total. Overall, 60% had a pregnancy termination in the second trimester, while 20% had a termination during the first trimester. Hysteroscopic resection was used to remove the intrauterine fetal bones in 69% of patients. In total, 59% of patients conceived following the procedure, 1% conceived despite the presence of intrauterine bones, 24% could not conceive at the time of the study and 16% had an unknown outcome. Transvaginal ultrasound was used for diagnosis in 41 (55%) patients, while pelvic ultrasound was used in 21 (28%) patients. In conclusion, secondary infertility is a common occurrence after a dilation and curettage procedure partially due to fetal bone retention. The gold standard for an accurate diagnosis and treatment is hysteroscopy.