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Essay Details:
Essay text:
therefore this is also
considered the fertile period (fertilization is most likely to be successful if sex occurs)
stage 4 : continual thickening of uterine lining (day 17-28)
if no fertilization occurs, the uterine lining will break down after day 28
if fertilization occurs, the uterine lining will not break down ater day 28 but will develop
into placenta.
Hormones involved in the Menstrual Cycle:
the ovaries would release 2 hormones, oestrogen and progesterone into the blood stream at diff times
in the menstrual cycle.
Oestrogen: causes repair and growth of the uterine lining.
--> which becomes thick and spongy with blood vessels
progesterone : maintains the uterine lining thick & well-supplied with blood
--> preparing it 4 implantation of embryo
fertilization and pregnancy:
fertilization : fusion of teh nucleus of an ovum(female sex cell)
with the nucleus of a sperm(male sex cell) in the fallopian tube
pregnancy: period of 9 months in which the embryo develops into a foetus
soon after implantation of embryo into uterine lining, placenta & amniotic sac will develop
Placenta: 1) site of exchange of materials between mother and foetus
--> has a large surface area
--> carries oxygen adn glucose to foetus
--> removes CO2 & urea from foetus
2) production of hormone
--> to maintain uterine lining...
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