Corpus Luteum and Progesterone — NEET Biology
✅ Asked in NEET 2021Females have a pair of ovaries located in the abdomen. Ovary is the primary female sex organ which produces one ovum during each menstrual cycle. In addition, ovary also produces two groups of steroid hormones called estrogen and progesterone. Ovary is composed of ovarian follicles and stromal tissues. The estrogen is synthesised and secreted mainly by the growing ovarian follicles. After ovulation, the ruptured follicle is converted to a structure called corpus luteum, which secretes mainly progesterone.
NTA tests students on the specific hormonal role of corpus luteum after ovulation. The corpus luteum is formed from the ruptured ovarian follicle and its primary function is to secrete progesterone, not estrogen. A common mistake is confusing which structure produces which hormone—students often mix up that estrogen comes from growing follicles while progesterone comes from corpus luteum. Remember: before ovulation, the follicle produces estrogen; after ovulation, the corpus luteum produces progesterone. This distinction is crucial for understanding the hormonal phases of the menstrual cycle and frequently appears in NEET questions about reproductive physiology and endocrine coordination.
The function of corpus luteum is to secrete: (NEET 2021)
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