… CountSperm ProductionSperm AnatomyChemical ReactionsSurvivability
Sperm Count

Average ejaculates can contain hundreds of millions of sperm per ejaculate, but the World Health Organization (WHO) considers men with a sperm count lower than 15 million sperm per milliliter to have oligospermia, which means “few sperm.” Men who have no observable amount of sperm in their ejaculate are …


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Table of Contents

The Sperm’s JourneySpermatogenesis ProcessIrregularities in Sperm ProductionConcluding Remarks
The Sperm’s Journey

The seminiferous tubules of the testicle are the site of sperm production. Once created, the sperm migrate to the epididymis to be stored for several weeks until they are mature. During the ejaculation process, the mature sperm travel …


Table of Contents

What Are Spermicides?Types of SpermicidesAdvantages of Using SpermicidesDisadvantages of Using SpermicidesConcluding Remarks
What Are Spermicides?

Spermicide is a substance that kills sperm on contact. Spermicides are available in a variety of different forms including creams, gels, foams, suppositories and films.1 Spermicides are inserted deep into the vagina, near the cervix …

Male Ejaculation

Ejaculation is the discharge of semen during a male orgasm. While other reasons for ejaculation may occur, it usually occurs in the final stage of orgasm for a male. Ejaculation generally occurs in spurts directly after the male feels the initial sensation of an orgasm. Once the male has ejaculated, the head of the penis …

Evolution and Human Sexuality

Evolution is defined as the change in frequency of certain traits across generations. The accumulation of new traits may lead to new characteristics or even new species over time. This means that, with time, enough changes can lead to the formation of a new species. Evolution is a continuous, extremely gradual process that has created …

Pre-cum (Cowper's Secretions)

… arousal by lubricating the head of the penis. In addition, pre-ejaculatory fluid is present in semen during ejaculation to protect and more easily allow movement for sperm.1 Pre-cum tends to be a sensitive issue as it was long believed to carry sperm; however, research on this issue has yielded mixed results. Here

The Biology of Reproduction

Every organism must reproduce (create offspring) in order to pass a part of themselves on into future generations. Depending on the organism, it can either reproduce using sexual or asexual reproduction, which both involve cell division. The parental traits of sexually reproducing organisms will also mix to form a unique combination in the offspring, and …

Male Infertility

… of Sperm Disorders and Their Appropriate TreatmentsWhat a Doctor’s Visit EntailsTypical TreatmentsConcluding Remarks
What Normally Happens

Every day, a male’s body will produce millions of sperm (the male gamete). Sperm is produced in the seminiferous tubules of the testicles contained in the scrotum (the sac of skin below the penis). This process is …

Female Infertility

Disclaimer note: While both males and females can be infertile, this article focuses on female infertility, its most common causes, and treatments. For information relating to male infertility click here.

Table of Contents

Overview of Female InfertilityDifferent DefinitionsWhat Causes Female Infertility?Testing for InfertilityTreating InfertilityConcluding Remarks
Overview of Female Infertility

Female infertility is defined as …