Human Reproduction and Contraception

GnRH of hypothalamus stimulates the synthesis and secretion of the two gonadotropin hormones, namely luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland. FSH is responsible for the ovulation. It stimulates the growth of ovarian follicle and growth of eggs in the ovaries. It is also responsible for the pubertal development. Corpus luteum is formed and maintained by the LH. 

• Corpus luteum is the group of cells that forms in an ovary and is responsible for the production of the hormone progesterone.
• Leydig cell or Interstitial cells are cells found adjacent to the seminiferous tubule that secretes testosterone.
• Hypothalamus secretes GnRH which in turns stimulates the pituitary gland to secrete FSH.
• Acrosome is the upper portion of the sperm and releases hyaluronidase.
• Thus, the correct answer is (C).

Reproductive efficiency is primarily limited by the ability to accurately detect when a cow is in heat and the biological success rate of fertilization (conception).

In cattle, ovulation typically occurs approximately 10 to 15 hours after the end of standing heat, which is about 28 to 32 hours after the onset of estrus.

Ovarian cysts in cattle are categorized based on their structure and function as either follicular cysts (thin-walled, produce estrogen) or luteal cysts (thick-walled, produce progesterone).

Cholecystokinin is a peptide hormone of the gastrointestinal system, responsible for stimulating the digestion of fat and protein. Cholecystokinin, previously called pancreozymin, is secreted in the duodenum and causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively. 

Shatavari is a rejuvenating herb that is commonly used to support female reproductive health. It helps balance hormones, nourishes the reproductive organs, and promotes overall well-being.

The grandmother hypothesis is a theory that explains why humans experience menopause. The theory proposes that menopause evolved because it allowed older women to help their daughters and granddaughters raise their children. This helped to increase the survival and reproductive success of the older women's genes.

Menarche is the term used to describe the first menstrual period in a girl, typically occurring between the ages of 12 and 14.

Deepening of the voice is a common physical change experienced by boys during puberty due to the increased production of testosterone.

Oligomenorrhea is the term used to describe the irregular menstrual cycles that are common during the early stages of puberty in girls, characterized by infrequent or absent periods.

Somatic growth spurt is the term used to describe the rapid growth in height and weight that occurs during puberty.

Gonadarche is the term used to describe the development of secondary sexual characteristics during puberty, such as breast development in girls and facial hair growth in boys.

Pubarche is the term used to describe the development of pubic hair during puberty.

Breast development is a common physical change experienced by girls during puberty due to the increased production of estrogen.