Threatened Abortion Anatomy
To better understand threatened miscarriage, it helps to understand the anatomy of the uterus, cervix, and Fallopian tubes.
Anatomy of the female reproductive tract includes:
- The uterus, cervix, and vaginal canal
- The fallopian tubes: these paired structures connect each ovary to the uterus.
- The ovaries: one on each side of the uterus. The normal ovary is approximately the size of an unshelled almond.
The fetus grows within the amniotic within the uterus:
- Szabo I, Szilagyi A. Management of threatened abortion. Early Pregnancy. 1996 Dec;2(4):233-40. 
- Weiss JL, Malone FD, Vidaver J, et al. Threatened abortion: A risk factor for poor pregnancy outcome, a population-based screening study. Am J Obstet Gynecol. 2004 Mar;190(3):745-50. 
- Yip SK, Sahota D, Cheung LP, Lam P, Haines CJ, Chung TK. Accuracy of clinical diagnostic methods of threatened abortion. Gynecol Obstet Invest. 2003;56(1):38-42.