Question

The following graph shows the levels of ovarian hormones during a menstrual cycle. What do 1 and 2 represent?

A. 1- Progesterone, 2- Estrogen
B. 1- FSH, 2- LH
C. 1- LH, 2- FSH
D. 1- Estrogen, 2- Progesterone

Answer 1

The menstrual cycle is the periodic natural transition that makes pregnancy possible in the female reproductive system (specifically the uterus and ovaries. Two classes of sex hormones, progesterone and oestrogen, are formed and released by the ovaries.

Complete answer: There are actually three major estrogens, known as oestradiol, estrone, and estriol. In order to encourage the healthy development of female sex characteristics during puberty and to ensure fertility, these substances function together. The two crucial female sex hormones are oestrogen and progesterone. Oestrogen is the primary female hormone released primarily by the ovaries, but in the adrenal glands and fat cells, some small quantities are also produced. After ovulation, progesterone is released by the ovaries and some amount is secreted during pregnancy by the placenta as well. The role of progesterone is primarily to prepare the uterine lining for a fertilised egg, to promote pregnancy, and also to suppress the development of oestrogen after ovulation through a negative feedback mechanism.
1 and 2 are oestrogen and progesterone, respectively, in the given graph. The oestrogen and progesterone levels and the oestrogen and progesterone levels, respectively. The amount of oestrogen and progesterone in the menstrual process decreases, the level of oestrogen in the follicular phase rises, and the level of progesterone increases in the luteal phase.

Hence, the correct answer is option D-1- Estrogen, 2- Progesterone.

Note: Oocytes (eggs) and hormones are produced as the primary function of the ovaries. The ovaries produce several million immature eggs at birth. There will be no new eggs being produced. Such eggs are continuously experiencing a process of growth and loss. Without reaching maturity, most will die. At all stages, including before birth, before puberty and when on birth control pills, this phase of egg loss occurs. Throughout its lifespan, the ovary undergoes a persistent oocyte depletion process (loss).