Sperm are produced in the male testicle (testis). The testis is filled with tiny coiled tubes (seminiferous tubules) through which sperm move as they are produced. Each seminiferous tubule is lined with sperm nurse cells (Sertoli cells) and sperm stem cells (Spermatagonia).
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The most common method of sperm collection for semen analysis or insemination is self-collection by masturbation and ejaculation into a sterile collection cup. Typically, the patient is given a clean private area that is stocked with erotic videotapes and magazines to assist with arousal.
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The female reproductive system is primarily regulated by five hormones including estrogen, progesterone, gonadotropin releasing hormone, follicle stimulating hormone, and luteinizing hormone. These hormones play a role in one or more stages of development and function of the female reproductive system.
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When it comes to making babies, women do the heavy lifting. The parts of the female reproductive system work together in a symphony of function that starts with fertilization and culminates in the birth of a baby.
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Donating blood is a generous life-saving gift which is tolerated very well by most donors. But some donors, especially teen donors, may experience side effects from donating blood. Most effects are minor but less than 1 percent of blood donors may experience more severe side effects.
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Triglycerides are fat molecules which are produced by digestion of food and released in the blood to be taken up by cells as needed for energy. High levels of triglycerides in your blood occur when calories ingested are more than calories expended.
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Every human being has 46 chromosomes, including two chromosomes (X ,Y) that determine gender. The Y chromosome is unique to males. Inheriting an X chromosome from the mother and a Y chromosome from the father makes the child male.
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A pregnant woman must carefully choose the fish in her diet to avoid dangerous contamination with mercury, a neurotoxin. According to the Food and Drug Administration, pregnant women should avoid undercooked or raw shellfish entirely.
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