A WOMAN switched her husband's sperm for her lover's while undergoing IVF before giving birth.

UK’s The Sun reports that Yana Anokhina’s husband had no idea that the little boy was not his and was kept in the dark for a year.

It was only after they separated that that she revealed the shocking deed.

The woman’s husband Maxim Anokhin sued the Moscow clinic that allowed the switch, after raising the child that he thought was his.

Courts awarded him $8200 in compensation for moral and financial damages.

The Sun reports that Maxim paid for the IVF treatment and provided his sperm under the impression he was going to be the father.

The couple later split and are now both in new relationships.

Yana is now in a relationship with the biological father of her son, while Maxim now has a child with his new partner, born without IVF treatment.