Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?
A
Uterus
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B
Graafian follicle
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C
Corpus luteum
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D
Foetus
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Solution
The correct option is C Corpus luteum The corpus luteum is the remnant structure of the Graafian follicle after the secondary oocyte is released during ovulation.
Corpus luteum is a temporary endocrine gland and it secretes relaxin and progesterone hormones.
Relaxin plays a major role in the softening, or ripening, of the cervix, thus allowing for smooth parturition. Relaxin is produced only during pregnancy.