Women are more sexually adventurous when trying for a baby, a survey found.
Half do it more often and a fifth change positions more frequently in the hope of conceiving quicker.
They change their behavior — both in and out of bed — because they are worried about their fertility, the poll shows.
But experts believe the biggest obstacle to conceiving is fretting about it.
Professor Allan Pacey, from the University of Sheffield, said: “Couples worry too much about this kind of thing.
“The key is that they are still having regular sex and they are enjoying it, rather than seeing it as a chore.”
The findings were from a survey of 1,000 women on the Netmums website.
It showed two-thirds of women worried about fertility before they even started trying for a baby.
Age, weight, work pressures and friends’ experiences were among the major causes of concern.
As a result, three-quarters said they changed their lifestyle or sexual behavior when trying to conceive.
Apart from shaking things up in the sack, a quarter adopted a healthier diet, a fifth tried to lose weight and a third quit or cut back on booze.
Others started taking vitamins or supplements. However, only a third of their partners made similar lifestyle changes.
Netmums’ Anne-Marie O’Leary said: “Fertility fear is so all-consuming for women nowadays they’re willing to try anything and everything to get pregnant.
“But the one piece of advice our users overwhelmingly offered to prospective parents is, ‘Relax, stay positive, and enjoy all of the sex’.”
