Q.1. What is Menstrual cycle? Q.2 What is function of placenta? Q.3 Differentiate between ovulation and implantation Q.4 What happened if egg is not fertilized? Q.5 Define Parturition
Answers
Explanation:
Q1. Menstrual cycle: The monthly cycle of changes in the ovaries and the lining of the uterus (endometrium), starting with the preparation of an egg for fertilization. When the follicle of the prepared egg in the ovary breaks, it is released for fertilization and ovulation occurs.
Q.2 The placenta is the passage that unites the fetus to the mother. Transmission of nutrients and oxygen from mother to the fetus and the release of carbon dioxide and waste materials from the fetus takes place through the placenta.
Q.3 While ovulation spotting happens around the time that your body releases an egg, implantation spotting occurs when a fertilized egg attaches to the inner lining of your uterus. Implantation spotting is one of the earliest signs of pregnancy.
Q.4 If the egg is not fertilized or does not implant, the woman's body sheds the egg and the endometrium. This shedding causes the bleeding in a woman's menstrual period.
Q.5 Vigorous contraction of the uterus atthe end of pregnancy causes expulsion/delivery of the fetuscalled as parturition. The signals for parturition originate from the fully developed fetus and the placenta which induces mild uterine contraction is called fetal ejection reflex.
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Answer:
1.)The menstrual cycle is the regular natural change that occurs in the female reproductive system that makes pregnancy possible. The cycle is required for the production of oocytes, and for the preparation of the uterus for pregnancy. The menstrual cycle occurs due to the rise and fall of estrogen.
2.)The placenta is the organ that, whilst separating the fetal from the maternal circulation, facilitates the exchange of nutrients and all other supplies necessary for fetal growth and well-being.
3.)While ovulation spotting happens around the time that your body releases an egg, implantation spotting occurs when a fertilized egg attaches to the inner lining of your uterus. Implantation spotting is one of the earliest signs of pregnancy.
4.)If the egg is not fertilized or does not implant, the woman's body sheds the egg and the endometrium. This shedding causes the bleeding in a woman's menstrual period. When a fertilized egg does implant, a hormone called human chorionic gonadotropin (hCG) begins to be produced in the uterus.
5.)Parturition means childbirth. Childbirth is the culmination of pregnancy, during which a baby grows inside a woman's uterus.