The increase in basal body temperature after ovulation is due to:
A. estrogen
B. Progesterone
C. LH
D. Gonadotropin releasing hormone
Correct Answer ‘ B. Progesterone
The increase in basal body temperature (BBT) after ovulation is due to Progesterone.
Explanation
• After ovulation, the corpus luteum in the ovary secretes progesterone.
• Progesterone has a thermogenic (heat-producing) effect on the hypothalamus.
• This causes the basal body temperature to rise by about 0.3–0.5°C and remains elevated until menstruation.
Therefore
• The increase in basal body temperature after ovulation is due to: Progesterone.
Other Options Details
Here are the descriptions of all the options:
A. Estrogen
• Estrogen is a primary female sex hormone produced mainly by the ovaries (specifically by the granulosa cells of the developing follicles).
• It is responsible for the development of female secondary sexual characteristics, such as breast development, widening of hips, and growth of pubic hair.
• Helps regulate the menstrual cycle, particularly the proliferative phase, and promotes growth of the endometrium.
• Also helps maintain bone health and influences fat distribution in the body.
B. Progesterone
• Progesterone is a hormone mainly produced by the corpus luteum in the ovary after ovulation.
• It maintains the secretory phase of the menstrual cycle and prepares the endometrium for implantation of a fertilized egg.
• Essential for maintaining pregnancy by supporting the uterine lining.
It also inhibits uterine contractions and suppresses ovulation during pregnancy.
C. LH (Luteinizing Hormone)
• LH is a hormone produced by the anterior pituitary gland.
• In females, it triggers ovulation, causing the release of a mature ovum from the Graafian follicle.
• Stimulates formation of the corpus luteum, which then secretes progesterone.
• In males, LH stimulates the Leydig cells in the testes to produce testosterone.
D. Gonadotropin Releasing Hormone (GnRH)
• GnRH is a hormone produced by the hypothalamus.
• It controls the production and release of FSH (Follicle Stimulating Hormone) and LH from the anterior pituitary gland.
• It plays a major role in regulating the reproductive cycle, puberty onset, and fertility.
• Released in a pulsatile manner for normal reproductive function.
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Writer: Vandita Singh, Lucknow (GS India Nursing Group)