The U.S. fertility rate—the number of children born to women of childbearing age—reached a record low in 2024. The average American woman between ages 15 and 44 gave birth to less than two children, ...

Research into how a father’s choices — such as diet, exercise, stress, nicotine use — may transfer traits to his children has become impossible to ignore. The standard sperm-meets-egg story posits ...

Even within the world of egg-laying animals, there is an incredible variety of reproductive strategies. Some species mate before the female lays her eggs, ensuring they are fertilized internally, ...

Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China Zhejiang Provincial Clinical Research ...

The US Surgeon General has called the child mental health crisis “the defining public health crisis of our time.” In 2020, 13 percent of US children aged 3 to 17 had a diagnosed mental or behavioral ...

You’ve potted, watered, de-pested, and pruned your houseplant — but after several months, you notice it looks less vibrant. It may be time for fertilizer. “Plants get their food from photosynthesis, ...

Polycystic ovary syndrome (PCOS) pathophysiology is modified by a multitude of internal and external factors that go far beyond the traditional stimulators and inhibitors of endocrine response and ...

In the scientific study of human biology, there is no political ideology. Biologists research embryonic development, hormones and sexual maturation to provide scientific evidence that can inform ...

On his first day back in power, President Donald Trump issued an executive order on gender that essentially states that males become males and females become female “at conception.” Subscribe to read ...

Climate change is reducing population densities of corals, which risks the onset of reproductive collapse once colonies become too far apart to achieve successful fertilization. Working with a natural ...

More than a million unused IVF embryos are in cryostorage. Are they the next pro-life frontier? But Hannah Strege watched it all unfold with another vulnerable group in mind: frozen embryos. In this ...