Testosterone is the major male hormone, responsible for the development of sexual characteristics, maintaining muscle mass and other body traits. Testosterone also plays a role in women, primarily as a precursor for forming estrogen. Normal...
Mirena, also known as levonorgestrel, is a plastic t-shaped intrauterine device placed into the uterus (womb) to prevent pregnancy and treat women with heavy menstrual bleeding, according to Drugs.com. Mirena is effective for up to five years and...
Testosterone, a steroid hormone that plays a major role in male development and sexual behavior, is produced by the testicles in response to stimulation by the pituitary gland. A low testosterone level, otherwise known as hypogonadism, can result...
While embryos are male or female from the day of conception, gender isn't obvious on ultrasound until at least 12 weeks, and more often 16 to 20 weeks, Dr. Joseph Woo of Hong Kong states in Obstetric Ultrasound. Male and females fetuses have...
The hormone testosterone is an androgen, or male hormone. It's produced by the testes of the male and is responsible for many of the physical and emotional features that distinguish men from women. Male fetuses begin producing testosterone as...
Testosterone is a hormone that is produced in large amounts in the testes of men, in small amounts in the ovaries of women and also in small amounts in the adrenal glands of both men and women. Testosterone is responsible for the development of...
Parents once had to rely exclusively upon old wives tales regarding the size and shape of a mom-to-be's belly or her degree of morning sickness to give them clues to their unborn baby's gender. Modern science allows many parents to find out the...
The male and female reproductive organs have evolved over millions of years to propagate the species. Both male and female organs arose from common embryonic origins. In the presence of active male-determining genes on the Y-chromosome, the...
The reproductive organs of humans, while ostensibly quite different from males to females, actually share most of their developmental roots. Early fetuses have identical reproductive systems, despite the fact that a baby's gender is determined...
Intersex problems, such as pseudohermaphroditism, true hermaphroditism or complex intersex disorders, may present at birth with clinical signs of ambiguous genitalia or may develop later as hormonal insufficiencies during puberty. Historically,...
According to MayoClinic.com, human papillomavirus, also known as HPV infections, have affected around 20 million people in the United States alone and there are more than 100 types of HPVs that can affect humans. These HPVs have the potential to...
Testosterone is a hormone produced by both men and women, though it's made in much higher concentrations in men. It's responsible for many adult male characteristics, both physical and psychological, and allows for reproduction. The hormone plays...
Many genetic disorders are associated with reproductive problems. Genetic disorders are caused by spontaneous gene mutations or by inherited genes. Inherited genes can be recessive--which means that both parents must pass on the gene for a child...
Acampomelic campomelic dysplasia (ACD) is a rare genetic syndrome. A form of campomelic dysplasia, ACD has the same features, except for bowing of the long bones. Features of the syndrome become apparent prenatally, or just after birth. ACD can be...
