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…
Tag: egg
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
Disclaimer Note: While both males and females can be infertile, this article focuses on male infertility, it’s most common causes and treatments. For information on female infertility click here. Infertility is when a male and female partner cannot successfully conceive a child after a year of frequent, unprotected intercourse. Male and female infertility are each responsible…
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. Overview of Female Infertility Female infertility is defined as the inability to conceive or carry a pregnancy to term after 12 months of unprotected intercourse, or…
How to Increase the Chances of Pregnancy
Some couples are able to get pregnant effortlessly, while others experience varying degrees of difficulty. Many couples who are trying to conceive are anxious to do so. Although having intercourse within the “fertile window” is one of the best known ways to increase the probability of fertilization, there are several other ways that couples can…
Sperm
Sperm are the male reproductive cells found in semen. When mature and motile, they are referred to as spermatozoa (singular: spermatozoon). In humans, sperm cells ideally contain 23 chromosomes (half of a human’s genetic material) and may combine with the 23 chromosomes contained in a female’s ovum during fertilization to form a new human being.1 A…
Birth Control Pill Overview
Birth control pills are one of the most effective contraceptive methods for preventing pregnancy. Commonly referred to as “The Pill,” this type of birth control comes in a variety of forms and can be taken in a variety of different ways depending on the method that works best for the individual. There are two main types of…
Intrauterine Device (IUD)
The IUD is a highly effective, long lasting form of birth control. The two different types, the hormonal IUD and the copper IUD, function in different ways, resulting in differing advantages and disadvantages. The IUD must be inserted by a trained health care professional, and it does not prevent against sexually transmitted infections (STIs). What Is…
Mittelschmerz (Painful Ovulation)
Mittelschmerz, German for “middle pain”, is also known as painful ovulation. It is a medical condition characterized by lower abdominal pain during ovulation that occurs midway through the menstrual cycle, about two weeks prior to the menstrual period.¹ Ovulation is the process in which an ovary releases an egg, or ovum, to be fertilized by…