Men currently only have two contraceptive options: condoms or a vasectomy.
Male contraceptives have been under development for at least the past 50 years, because of the success of the female pill and pessimism about men taking a pill.
At least half of the donors who had donated anonymously were in favour of their offspring being able to know their identity.
The news that Victorian sperm donor records from the 1970s and 1980s were preserved and are now accessible creates both challenges and opportunities for both donors and their offspring.
Cross-sections of the spermatozoa of the Monogene
Chimaericola leptogaster as seen under an electron microscope.
In biology, the study of these very special sperm cells makes it possible to learn more about species such as parasitic worms.
The echidna has a four-headed penis.
The competition to father young is often most intense behind the scenes.
Trying for a baby? Take it easy on these ones, Dad.
Research is increasingly finding an association between alcohol consumption and sperm health.
Is this how we got the sperm and the egg?
An ancient sexual conflict over mitochondrial inheritance may be responsible for the evolution of the two sexes as we know them.
Egg donors, sperm donors and surrogates are critical participants and patients in the use of reproductive technologies - so why are their rights and heath repeatedly overlooked?
Health Canada is drafting important regulations for assisted reproductive technologies. Initial documents treat egg donors and surrogates as little more than spare parts and walking wombs.
Is this actually a possible future?
The release of TV program The Handmaid's Tale and a study on male sperm numbers have left some worried about the future of human fertility.
A better understanding of sperm could help develop new fertility treatments and contraceptives for men.
Spirulina is a blue-green algae with multiple uses.
Numerous studies suggest that spirulina could help safeguard fertility.
If this trend continues, most men will be infertile by 2060.
Doctors should examine more than just sperm count in infertile men.
Still got it.
Thinking of having a baby? It's not all down to women to get healthy in preparation.
Well hello, Dolly.
Photo courtesy of The Roslin Institute, The University of Edinburgh.
In 1997, scientists announced they'd created a healthy sheep cloned from another ewe's mammary gland cell. Two decades on, the technique is being refined and applied to new challenges.
Preconception planning focuses on improving the health of parents to lower the risk of obesity in children.
If you're planning to become a parent, better lifestyle habits can reduce the risk of obesity in your children.
Victorian mores influenced ideas not just about men and women but animals too.
Joseph Christian Leyendecker
Victorian attitudes influenced what scientists thought they were observing about sexual behaviors in the animal world. But modern techniques reveal the myth for what it is.
Sex is a form of biological communication, and women use it to make decisions on whether to invest in a pregnancy.
Health benefits come with regular sexual contact with the same male partner before pregnancy commences.
Pocket your phone without worry.
Phone image via www.shutterstock.com.
Did your holiday gift list include radiation-shielding undies to protect your privates from cellphone radio waves? A radiation expert explains they're unnecessary – your phone won't affect your fertility.
Most men don’t know the normal size of testes.
Men with Klinefelter’s syndrome are infertile, as the extra X chromosome affects the ability to produce sperm.
Sexual competition has made sperm the most diverse - and fascinating - cells in the animal kingdom.