To determine: The number of days prior to ovulation and after ovulation during which there is chance for pregnancy, if a female ovulates on the 14th day of her cycle.
Concept introduction: The conception period or period of fertility is usually calculated based on the menstrual cycle length of the female and the number of days menstruation lasts in a female. The conception period is calculated to increase the chances of pregnancy for the couples. Fertility window is the number of days the couples should have unprotected intercourse to conceive.
To explain: The total fertility window for this female.
Concept introduction: The conception period or period of fertility is usually calculated based on the menstrual cycle length of the female and the number of days menstruation lasts in a female. The conception period is calculated to increase the chances of pregnancy for the couples. Fertility window is the number of days the couples should have unprotected intercourse to conceive.
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Campbell Essential Biology with Physiology (6th Edition)
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- A couple living in Florida is trying to have a baby, but they are having trouble getting pregnant. The male is very light skinned yet enjoys spending as much time as possible outdoors in the sun. From the male's perspective, why might he be contributing to the trouble with getting pregnant? Excessive ultraviolet light exposure can reduce folate levels, and folate is required for normal sperm development. Excessive heat from the sunlight inhibits normal sperm production; thus, he probably does not have enough sperm. The male does not have enough melanin production to support normal sperm development. Excessive sunlight exposure can rapidly increase folate levels, which then inhibits normal sperm development. Normal sperm development occurs best in colder temperatures; thus, living in Florida he has a reduced chance of getting his partner pregnant.arrow_forwardThere are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Proteins on the sperm plasma membrane bind to ZP3 molecules within the zona pellucida of the egg. Why is this event important? Zona binding triggers the acrosome reaction, in which the sperm plasma membrane fuses with the outer acrosomal membrane, causing exocytosis of acrosomal contents. What is in the "acrosomal content"? Acrosomal enzymes begin to dissolve a hole in the zona pellucida. This enzymatic degradation, accompanied by rapid sperm tail beating, moves the sperm through the zona. Where does the sperm intend to reach?arrow_forwardThe endometrium thickens during the uterine cycle, but disintegrates if the egg is not fertilized. The disintegration and shedding of the endometrium is caused by a drop in progesterone levels an increase in estrogen levels by increase in human chorionic gonadotropin levels a drop in prolactin levelsarrow_forward
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