Which of the following is a mass within the ovary that secretes hormones to maintain the uterine lining during pregnancy?
A.
Corpus luteum
B.
Umbilical cord
C.
Oocyte
D.
Oviduct
The correct answer is:
A. Corpus luteum
The corpus luteum is a mass of cells in the ovary that secretes hormones, primarily progesterone, to maintain the uterine lining during early pregnancy.