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Reproductive System

Various Methods of Birth Control Work

Birth control methods may be categorized into several groups based on their mode of action: hormonal, chemical and behavioral contraceptive methods, anti-implantation devices, sterilization, and induced abortion. Contraception Contraception is the prevention of conception, which is the union of sperm nucleus and ovum nucleus. Contraceptive methods are

Disorders of the Reproductive Systems

Male Disorders Prostatitis is acute or chronic inflammation of the prostate gland and is often associated with tenderness and enlargement of the prostate. It is usually caused by bacteria in connection with urinary tract infections or sexually transmitted diseases. It also occurs without a known cause. Benign

The Processes of Fertilization, Preembryonic Development and Implantation

Each primary oocyte undergoes the first meiotic division while still in the ovarian follicle. This division forms a secondary oocyte and the first polar body, each containing 23 chromosomes. At ovulation, the secondary oocyte and first polar body, still enclosed within a sphere of granulosa cells, are

Embryonic Development – Germ Layers, Extraembryonic Membranes and Placenta

The embryonic stage of development begins at the start of the third week of development and is completed at the end of the eighth week. During this time, the embryo undergoes rapid development, forming the rudiments of all body organs, extraembryonic membranes, and the placenta. By the

Fetal Development Stages

At the beginning of the ninth week of development, the developing offspring has a distinctively human appearance and is now referred to as a fetus. Weeks of Development Changes 5-8 Weeks Recognizable human shape; head as large as the body; eyes far apart; upper and lower limbs

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