Question

Most important hormone in the post-ovulatory phase.
A.Progesterone
B.Estrogen
C.HCG
D.FSH

Answer 1

Hint:Luteinizing hormone stimulates egg release which is called ovulation, which usually occurs 16 to 32 hours after the surge begins. During the surge the estrogen level decreases and the progesterone level increases. During the luteal phase, luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels decrease.

Complete answer:Explaination for above options are:
(A) The progesterone hormone is one of the most important hormones in the menstrual cycle. It is manufactured in the corpus luteum. The uterus starts to create a highly vascularized bed for a fertilized egg while the progesterone increases. If pregnancy occurs, the corpus luteum produces progesterone until about 10 weeks gestation.
(B) Estrogens are hormones that are important for sexual and reproductive development, mainly in women. They are also referred to as female sex hormones. The term "estrogen" refers to all of the chemically similar hormones in this group, which are estrone, estradiol (primary in women of reproductive age), and estriol.
(C) Human chorionic gonadotropin (hCG) is a hormone for the maternal recognition of pregnancy produced by trophoblast cells that are surrounding a growing embryo (syncytiotrophoblast initially), which eventually forms the placenta after implantation.
(D) Follicle-stimulating hormone (FSH) is a gonadotropin, a glycoprotein polypeptide hormone. The gonadotropic cells of the anterior pituitary gland produce the follicle-stimulating hormone (FSH) and regulate the development, growth, pubertal maturation, and reproductive processes of the body.
Hence, the correct option is (A) Progesterone.

Note:Each menstruation cycle can be divided into three phases based on events in the ovarian cycle. The follicular phase, ovulation, and luteal phase are the three phases in the ovarian cycle. It is controlled by many different glands and the hormones that these glands produce. Having heavy or painful periods and premenstrual syndrome are the common menstrual problem for females.