__________ is a female sex steroid hormone that is primarily produced by the ovaries. In addition to its role in promoting conception, it is responsible for the development of female secondary sexual characteristics.单项选择题
A
LH
B
Estrogen
C
Progesterone
D
FSH

Question

__________ is a female sex steroid hormone that is primarily produced by the ovaries. In addition to its role in promoting conception, it is responsible for the development of female secondary sexual characteristics.单项选择题

A

LH

B

Estrogen

C

Progesterone

D

FSH

BlackTom AI · Accepted Answer

Reiterating the question: the statement describes a female sex steroid hormone that is mainly produced by the ovaries and is involved in promoting conception as well as development of female secondary sexual characteristics.
Option 1 (LH): Luteinizing hormone is a peptide hormone produced by the pituitary gland, not a steroid hormone produced by the ovaries. Its primary role is to trigger ovulation and stimulate testosterone production in males, rather than serving as the ovarian-produced estrogen responsible for secondary sexual characteristics.
Option 2 (Estrogen): Estrogen is a class of steroid hormones produced mainly by ovarian follicles. It drives the development of female secondary sexual characteristics (such as breast development, widening of the hips, distribution of body fat) and plays a key role in regulating the menstrual cycle and promoting conception, particularly by supporting the endometrium. This aligns with the description given in the question.
Option 3 (Progesterone): Progesterone is another sex hormone produced by the ovaries, especially after ovulation, and is crucial for preparing and maintaining the uterine lining for possible pregnancy. While it is essential for reproduction, it is not primarily associated with promoting the development of female secondary sexual characteristics, which is a hallmark typically attributed to estrogens.
Option 4 (FSH): Follicle-stimulating hormone is a gonadotropin secreted by the pituitary gland, not a steroid produced by the ovaries. Its main function is to stimulate ovarian follicle growth in females and spermatogenesis in males. It does not drive the development of secondary sexual characteristics in the way estrogens do.
In summary, the statement’s emphasis on a female sex steroid produced by the ovaries and on both conception and secondary sexual characteristics best matches estrogen, while the other options refer to hormones with different sources, classifications, or primary roles.

__________ is a female sex steroid hormone that is primarily produced by the ovaries. In addition to its role in promoting conception, it is responsible for the development of female secondary sexual characteristics.单项选择题

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