Do You Know About Fertility Biology?

Explanation
Hormonal cycle determines the ability of a woman to give birth. The menstrual cycle is regulated by hormones such as estrogen and progesterone, which control the release of eggs from the ovaries and prepare the uterus for pregnancy. These hormones play a crucial role in the fertility of a woman, as they regulate ovulation and create an environment suitable for fertilization and implantation of a fertilized egg. Therefore, the hormonal cycle directly affects a woman's ability to conceive and give birth.

Explanation
The pregnancy cycle is typically based on hormones and lasts for approximately 28 days. This is the average length of a menstrual cycle in women, which is regulated by hormones such as estrogen and progesterone. During this time, the uterus prepares for possible pregnancy by thickening its lining, and if fertilization does not occur, the lining is shed through menstruation. This 28-day cycle is considered normal and can vary slightly from woman to woman.

Explanation
The usual duration for the fertile period during a hormonal cycle is 5 days. This refers to the time when a woman is most likely to conceive, as it is when ovulation occurs and the egg is released from the ovary. Sperm can survive in the reproductive tract for up to 5 days, so having intercourse during this period increases the chances of fertilization.

Explanation
Infertility refers to the inability to conceive a child. While the age at which individuals may experience infertility can vary, it is generally accepted that fertility declines with age, particularly for women. Women are typically most fertile in their 20s and early 30s, and by the age of 35, fertility starts to decline more significantly. By the age of 50, most women have reached menopause, which marks the end of their reproductive years and makes it highly unlikely for them to conceive naturally. Therefore, 50 is a reasonable age at which an individual may become infertile.

Explanation
Menses refers to the shedding of the uterine lining during a woman's menstrual cycle. This process is triggered by hormonal changes in the body. The correct answer suggests that menses, or the shedding of the uterine lining, is what begins a woman's menstrual cycle.

Explanation
The ovule is capable of being fertilized for a period of 48 hours. This means that after the release of the ovule from the ovary, it can be fertilized by a sperm within this time frame. After 48 hours, if fertilization has not occurred, the ovule will degenerate and the chance of pregnancy decreases.

Explanation
Sperm can survive in a uterus for a minimum of 48 hours. This is because the female reproductive system provides a supportive environment for the sperm to survive and travel towards the egg. The cervical mucus helps to nourish and protect the sperm, allowing them to stay alive for up to two days. This extended survival time increases the chances of fertilization occurring if intercourse happens a day or two before ovulation.

Explanation
Menopause typically begins in a woman's late 40s or early 50s. The average age for menopause to occur is around 51, but it can vary. Some women may experience menopause as early as their late 30s or as late as their early 60s. Therefore, the answer of 48 is within the typical range for the onset of menopause.

Explanation
As men age, their bodies naturally produce less semen. This is because the production of semen is closely linked to the production of testosterone, which tends to decrease with age. Additionally, as men age, the health and function of their reproductive organs may decline, leading to a decrease in semen production. Therefore, age is capable of reducing the production of semen in men.

Explanation
A sperm can survive in the uterus for a maximum of 120 hours. This is because the cervical mucus provides a favorable environment for the sperm to survive and travel towards the fallopian tubes where fertilization can occur. The lifespan of a sperm is influenced by various factors such as the quality of the cervical mucus, the woman's fertility, and the timing of intercourse in relation to ovulation. However, it is important to note that the majority of sperm typically only survive for a few hours to a few days inside the female reproductive system.