Question

All of the statements concerning pregnancy are accurate except:
A. The detection of human chorionic gonadotropin in the urine forms the basis for pregnancy tests.
B. The cyclic release of pituitary gonadotropins and ovarian steroids is continued.
C. The mammary gland tissue of the pregnant woman is stimulated to develop by placental hormones.
D. The corpus luteum of pregnancy maintains the uterus until the placenta is well established.

Answer 1

Hint: Human chorionic gonadotropin (hCG) is a hormone that is produced soon after fertilization by the developing placenta. hCG can be spotted in urine as early as 7 to 10 days after conception in a normal pregnancy. The placenta is an essential endocrine gland during pregnancy. It produces hormones such as hCG, progesterone, and estrogen, which stimulate the mammary gland.

Step by step solution:
Pituitary gonadotropins enhance the synthesis as well as production of both steroid hormones, like progesterone, and peptide hormones, like inhibin, in the granulosa cells of the ovaries. Moreover, the differential regulation of peptides, steroid hormone secretion by LH and FSH, is poorly understood.
The cyclic release of pituitary gonadotropins as well as ovarian steroids is reduced after pregnancy. After the egg is released, the ovarian follicles transform into the corpus luteum. The hCG stimulates the corpus luteum to continue secreting progesterone, which aids in the maintenance of pregnancy.
Hormones control the function of the mammary gland. During puberty, rising estrogen levels stimulate the development of glandular tissue in the female breast. Estrogen also provokes the breast to grow in size by causing adipose tissue to accumulate. Progesterone promotes the growth of the duct system. These hormones promote the development of the mammary glands during pregnancy. Prolactin from the anterior pituitary gland stimulates milk production within the glandular tissue, while oxytocin causes milk ejection from the glands.

So, option B is correct.

Note: During pregnancy, the corpus luteum serves several purposes. First and foremost, before conception. Progesterone is produced in the gland by the start of the second half of the cycle. It is in charge of preparing the uterus for a potential pregnancy and child. The corpus luteum commences to function as a full endocrine gland after fertilization.