Antibodies Stop Sperm in Their Tracks
Antibodies Stop Sperm in Their Tracks
Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.
Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.
insemination
Image of the Day: Self-Insemination
Carolyn Wilke | Feb 1, 2019 | 1 min read
Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.
Self-fertilizing Worms Stab Their Own Heads
Amanda B. Keener | Jul 1, 2015 | 1 min read
The flatworm, Macrostomum hystrix, can inject its own sperm into its head, a new study shows.
Book Excerpt from Nature’s Nether Regions
Menno Schilthuizen | Jun 30, 2014 | 4 min read
In Chapter 6, “Bateman Returns,” author Menno Schilthuizen surveys the battlefield of the evolutionary arms race that has led to, among other things, such excesses as “traumatic sex.”