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Assalamualaikum warahmatullahi wabarakatuh, see you again with Bonova on this channel as a continuation of the reproductive system in humans, this time I will discuss about menstruation, fertilization and pregnancy
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Generally, women who have entered puberty will experience menstruation. Menstruation is a condition in which blood, veins, and epithelial cells that line up the uterus
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If a woman is menstruating, then blood will come out through her vagina. Menstruation usually happens once a month. The menstrual cycle will occur if the egg cells produced by the ovaries are not drained by the sperm cells. Generally, one menstrual cycle lasts 28 days. However, women who experience a longer menstrual cycle
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A woman who has a short menstrual cycle will have a cycle of about 18 days, while a woman who has a long menstrual cycle will have a cycle of about 40 days. The menstrual cycle is divided into several phases. The first phase is the menstrual phase.
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At this stage, FSH hormone or follicle stimulating hormone triggers the development of follicles in the ovarian. FSH hormone is a hormone produced by pituitary gland or hypofysis. This gland is located in the front of the brain. At this stage, the uterus wall is straight and a woman is menstruating. In the process of follicle development, there are several follicles that develop.
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there is only one follicle that can continue to grow every month. At the beginning of its development, the follicle produces estrogen and progesterone hormones. These two hormones will trigger the uterus to thicken. At this time, the uterus is undergoing a proliferation phase.
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The purpose of thickening the uterus is to prepare the place where the embryo is attached when the egg cell is lowered by the sperm. The function of estrogen hormone is to re-mix pituitary gland to produce FSH and LH hormones.
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LH hormone is continuously produced and increased gradually. LH hormone increases will trigger the release of egg cells from the cooked follicle. This process is called ovulation. The third is the secretory phase. The follicle that has released the egg cells will turn into the luteum corpus. Egg cells that have been ovulated will be caught
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Fimbriae and will move towards the fallopian tube. If at that time the egg cell is not fertilized by sperm or fertilization does not occur, then a certain signal will be sent from the luteum corpus to prevent the production of estrogen and progesterone hormones again.
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Thus, during this phase, the amount of estrogen and progesterone hormones in women is reduced. The low estrogen and progesterone hormone hormone, causes the network of the damaged uterine wall arrangement and blood flow in the uterine wall to break, so that women will experience menstruation. Then, what if the egg cells found in the fallopian tube are digested by sperm? Do you know how fertilization and pregnancy occur?
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If there is a sperm cell that enters the female reproductive tract, the sperm cell will move towards the egg cell. Once the sperm cell has met, the sperm head will enter the egg cell and leave the tail outside. This process is what starts the process of fertilization. Fertilization is the process of the secretion of the sperm cell with the egg cell, so it forms a zygote. This fertilization process takes place in the fallopian tube.
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Then a zygote is formed. The zygote that is formed after the fertilization will do the division. Then it develops into an embryo that will go to the uterus. Then it is planted or implanted into the endometrium. This condition is a woman who is pregnant.
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embryos develop in the womb so that they are ready to be born for 9 months 10 days or about 38 weeks. Next is the development of the fetus in the womb until it is born into a baby.
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So, this is my explanation about the human reproductive system. If there are things that you don't understand, try asking your teacher at school. See you in another video. Wassalamualaikum.
