Just like a supermarket avocado, the squishiness of fertilized human eggs could hint at how healthy and viable their embryos are—which would be a huge benefit for the millions of in-vitro fertilization babies now being born worldwide.
Menopause is one of the oddest features of human reproductive biology. Not the hot flashes or the forgetfulness, but the fact that older women lose the ability to have babies. Now researchers say that once it appeared, menopause may have had a ripple effect on human mating that helped create the human pair-bond.
Are you in a public place? Look around. Can you tell whether any of the women you see are ovulating, just by looking at them? Neither can anybody else. But several small studies have suggested that men nevertheless find women’s faces more attractive when they’re most fertile. No one knows what signals the men are…
In a medical first, a woman has given birth to a healthy baby boy from a transplant of her own frozen ovarian tissue preserved when she was just 13-years-old. It’s a remarkable breakthrough that’s poised to benefit young people who lose their fertility because of cancer treatments.
We know how to successfully freeze, store, and thaw human sperm. We’re still on a learning curve with human eggs. Abby Rabinowitz’s recent feature at Nautilus explores the all-too limited statistics about how well the process works and the data on why more healthy women are choosing to try it anyway.
Every time someone ejaculates, it produces millions of sperm. But the average pair of testicles produces billions of sperm cells over an entire lifetime. Why don’t they create all of their sperm in one go? Answer: Because testicles have a complicated process to avoid running out of sperm and endangering future…
British scientists have finally figured out how sperm is able to connect with an egg. The process is facilitated by a molecule dubbed Juno, a protein that allows sperm to dock to the surface of an egg. The discovery could introduce new fertility treatments and birth control.
Researchers have shown that male mice that eat yogurt lug around bigger testicles, inseminate partners faster, and produce more offspring than those who don't. And yogurt-eating females give birth to larger and healthier litters.
We use cotton to make our clothes and underwear — but should we start using a chemical made by cotton to control how we use what is in our underwear?
Researchers can now determine if newly-fertilized mouse eggs will produce healthy offspring simply by observing them. Their findings may have implications for improving the rate of conception in couples undergoing in vitro fertilization, many of whom can only afford to perform the expensive procedure once or twice.
At one point in Misconception, the "fertility thriller" by renowned fertility specialist (and Natalie Portman's dad) Avner Hershlag, someone writes a letter to the First Lady that reads:
As far as male fertility is concerned, length really is important...except the length in question isn't the one you're thinking about. The crucial distance is actually the length between scrotum and anus. Yes, it's all about the taint.
For gentlemen only: Your fertility may be dictated by your skeleton. New research in mice has shown that there's a very strong link between the bone hormone osteocalcin, and the production of testosterone. Male mice with low levels of osteocalcin had small and infrequent litters compared to those with higher amounts…
A Danish woman became the first woman on Earth to give birth to a second child after an ovary transplant — and the second child happened naturally, without any fertility treatments at all.
We all know that IVF and other innovations can help infertile couples have children. But can science also help family structures emerge that have never existed before, like kids with three parents? It already has. Here are four examples.