... Progestin [progesterone] which is the hormone of the corpus luteum of pregnancy is necessary in adequate amounts not only to prepare the endometrium for implantation but also to inhibit uterine contractions in order that the early pregnancy may remain attached to the decidua. In the early weeks of pregnancy these necessary amounts are produced by the corpus luteum of pregnancy. With the completion of placentation which is usually about the twelfth week the placenta takes over the function of the corpus luteum of pregnancy.This succinct statement by Reis represents the commonly accepted fact that the presence of an ovary (producing the hormone, progesterone, of the corpus luteum) is necessary for the continuance of a pregnancy during the first twelve weeks. Considerable doubt is cast on such a premise by the case reported by Young2 and the case to be reported here, which are similar both
BONN K. BILATERAL OOPHORECTOMY IN EARLY PREGNANCY: Cesarean Section at Term. Arch Surg. 1947;55(3):288–291. doi:10.1001/archsurg.1947.01230080294004
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