Дала уже кучу ссылок.Например (авторы в конце указаны).http://www.emedicinehealth.com/miscarriage/article_em.htm"Miscarriage TreatmentIf your health care provider feels that you are having a spontaneous abortion or miscarriage, little can be done in the way of prevention"http://www.webmd.com/baby/tc/miscarriage-treatment-overviewThere is no treatment that can stop a miscarriage.If you have vaginal bleeding but tests suggest that your pregnancy is still progressing, your doctor may recommend:Resting. You will be advised to temporarily avoid sexual intercourse (pelvic rest) and heavy activity. Your doctor may recommend bed rest. But most research shows that bed rest does not prevent miscarriage.8Taking progesterone. You may be treated with the hormone progesterone to help maintain the pregnancy. This treatment, though, may serve only to delay a miscarriage and has not been proved effective for preventing a miscarriage.9 (Progesterone has only shown promise for preventing preterm birth later in a high-risk pregnancy.10) 9.Haas DM, Ramsey PS (2008). Progestogen for preventing miscarriage. Cochrane Database of Systematic Reviews (2).10.American College of Obstetricians and Gynecologists (2008). Use of progesterone to reduce preterm birth. ACOG Committee Opinion No. 419. Obstetrics and Gynecology, 112: 963-965.http://www2.cochrane.org/reviews/en/ab003511.htmlNo evidence that progestogen can prevent miscarriage.Hormones called progestogens prepare the womb (uterus) to receive and support the newly fertilised egg. It has been suggested that some women who miscarry may not make enough progesterone, so supplementing with progesterone has been suggested as a possible way to prevent miscarriage. This review of fifteen trials (2118 women) found no evidence that progestogens can prevent miscarriage in general. There was evidence, however, that women who have suffered three or more miscarriages may benefit from progestogen during pregnancy but more trials are needed and are under way, particularly where potential adverse effects on the baby are measured.http://www.umm.edu/altmed/articles/miscarriage-000108.htmНу и так далее