New Research Shows That Women’s Eggs Prefer Some Men’s Sperm Over Others

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According to a study, a woman’s eggs may be selective towards sperm cells and prefer some the others.

The study carried by Stockholm University, in with the Manchester University NHS Foundation Trust (MFT) looked into the chemicals used by a female egg to attract male sperm and results show that a woman’s eggs may prefer sperm cells some men to others.

‘Human eggs release chemicals called chemoattractants that attract sperm to unfertilized eggs. We wanted to know if eggs use these chemical signals to pick which sperm they attract,’ said John Fitzpatrick, an associate at Stockholm University.

The study specifically looked at follicular fluid, which surrounds the eggs and contains the chemicals that attract sperm.

The study checked if the fluids from attracted certain sperm others and the result showed does. The team obtained anonymous egg and sperm samples from couples undergoing IVF at St Mary’s in Manchester.

‘Follicular fluid from one female was better at attracting sperm from one male, while follicular fluid from another female was better at attracting sperm from a male,’ said Fitzpatrick.

‘This shows that interactions between human eggs and sperm depend the specific identity the and men involved.’

seems that even if a woman has chosen a partner to mate with, ’s not a must her egg and his sperm will attract each according to the study.


According to Fitzpatrick, sperm have only one job which is to fertilise the eggs. So they won’t be choosy about which egg they fertilise.

The study suggests that eggs have evolved and now pick quality or genetically compatible sperm.

“The idea that eggs are choosing sperm is really novel in human fertility’ said Professor Daniel Brison, the scientific the Department Reproductive Medicine at Saint Mary’s.

the way eggs and sperm interact will advance fertility treatments and may eventually help understand some of the currently ‘unexplained’ causes of infertility in couples.’