explain menstrual cycle in human females. how can the scientific understanding of menstrual cycle of human females help as contraceptive measure? (3marks)
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Answer:
The menstrual cycle is the regular natural change that occurs in the female reproductive system (specifically the uterus and ovaries) that makes pregnancy possible. The cycle is required for the production of oocytes, and for the preparation of the uterus for pregnancy.
Explanation:
The four phases of the menstrual cycle are menstruation, the follicular phase, ovulation and the luteal phase. Common menstrual problems include heavy or painful periods and premenstrual syndrome (PMS). Knowing when in the menstrual cycle a woman is most likely to conceive can increase the chance of pregnancy.
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Secondary School Biology 5 points
Scientific understanding of the menstrual cycle of human females helps as a contraceptive measure
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Scientific understanding of menstrual cycle of human females are very important as a contraceptive measures.
It helps in following ways :
(i) Safe period (Rhythm method)
A week before and a week after menstrual bleeding is considered as safe period for sexual intercourse.
The idea is based on following facts :
(A) Ovulation occurs on 14th day of cycle and ovum survives for about 2 days.
(B) Sperms remain alive for about 3 days.
This method reduces the chances of pregenancy by about 80%.
(ii) Pills used by females are also dependent on menstrual cycle. The pills have to be taken daily for a period of 21 days starting preferably within first five days of menstrual cycle.
It is repeated again after period of 7 days.
Hope your doubt is clear