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The Y-Chromosome in Animals

The Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the nineteenth and twentieth centuries, the development of new microscopic and molecular techniques, including DNA sequencing, enabled scientists to confirm the hypothesis that chromosomes determine the sex of developing organisms. In an adult organism, the genes on the Y-chromosome help produce the male gamete, the sperm cell. Beginning in the 1980s, many studies of human populations used the Y-chromosome gene sequences to trace paternal lineages.

Format: Articles

Subject: Reproduction, Theories

No-scalpel Vasectomy

No-scalpel vasectomy, or NSV or keyhole vasectomy, is a surgical method of sterilization that involves puncturing the skin of the scrotum to access the vas deferens, a tube that carries spermatozoa, or sperm, from the testes to the penis. The surgeon performing the procedure blocks the flow of sperm through the vas deferens, sterilizing the patient. NSV is a less invasive procedure, as it does not use a scalpel to make a deep cut on sensitive scrotal tissue.

Format: Articles

Subject: Technologies, People, Organizations, Places, Reproduction

"Seventh Lambeth Conference, Resolutions 9-20" (1930) by the Anglican Communion

In 1930, bishops of the Anglican Church from various countries published resolutions from their seventh Lambeth Conference in England. The Lambeth Conference brings together leaders of international Anglican churches approximately every ten years to discuss current issues and come to a consensus. In the published resolutions, the church leaders state their conclusions on issues ranging from the organization of the Anglican Church to contemporary social events.

Format: Articles

Subject: Publications, Reproduction

“Labor and Delivery Outcomes among Young Adolescents” (2015), by Ana J. Torvie, Lisa S. Callegari, Melissa A. Schiff, Katherine E. Debiec

In July 2015, Ana J. Torvie, Lisa S. Callegari, Melissa A. Schiff, and Katherine E. Debiec published “Labor and Delivery Outcomes Among Young Adolescents,” hereafter “Labor and Delivery Outcomes,” in the American Journal for Obstetrics and Gynecology. The authors conducted a study using birth certificate data and hospital records in the state of Washington to compare the frequency and outcomes of cesarean and surgically assisted vaginal births among different age groups of pregnant people.

Format: Articles

Subject: Publications, Reproduction

Stump v. Sparkman (1978)

On March 28, 1978, in Stump v. Sparkman, hereafter Stump, the United States Supreme Court held, in a five-to-three decision, that judges have absolute immunity from lawsuits involving any harm their judicial decisions cause. Linda Sparkman, who was unknowingly sterilized when she was fifteen years old in 1971, sued Harold Stump, the county circuit court judge who signed the petition to allow Sparkman’s mother to have her sterilized. Sparkman’s mother stated to Stump that she wanted her daughter sterilized because of Sparkman’s alleged mental deficiencies and sexual promiscuity.

Format: Articles

Subject: Legal, Ethics, Reproduction

“Female Ejaculation: A Case Study” (1981), by Frank Addiego, Edwin G. Belzer Jr., Jill Comolli, William Moger, John D. Perry, and Beverly Whipple

In 1981, Frank Addiego and colleagues published “Female Ejaculation: A Case Study” in The Journal of Sex Research. In the article, the authors find that female ejaculation, or the expulsion of fluid from a female’s urethra during or before orgasm, is a legitimate phenomenon that can occur when one stimulates an area in the vaginal wall that the team names the Gräfenberg-spot. According to the authors, at the time of publication, many individuals believed that if a female expelled fluid during orgasm, the fluid was urine and, thus, improper bladder control caused the expulsions.

Format: Articles

Subject: Publications, Processes, Reproduction

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