Some men wanted to avoid pregnancy in relationships they knew were not serious and took the initiative to use condoms, withdrawal or the calendar method.
Couples tended to switch to traditional methods, such as withdrawal or the calendar method.
The researchers found that use of the calendar method in women trying to conceive resulted in only one third of cycles where peak fertile days were correctly predicted.
Like the calendar method, our test is safe and non-invasive," Ellis said.
Use of the calendar method was lowest among the youngest age-group and highest among the oldest (1% vs.
Withdrawal was used by 25% of at-risk respondents, and the calendar method by 17%; the latter method was reported by 24% of 35-44-year-olds and 16% of 25-34-year-olds, but by only 6% of the youngest respondents.
The calendar method of contraception, where couples avoid having sex during the woman's most fertile time of the month, is even more unreliable than previously thought, researchers said yesterday.
The calendar method works on the basis that there are six days during the average woman's menstrual cycle when they can fall pregnant.
Alternatives to vaginal intercourse practiced during the fertile time among calendar method
users in Ireland.
AThe calendar method
involves abstaining from sex during a woman's fertile period.
EMA analyses of drinking have been compared to calendar methods
, such as timeline follow-back (TLFB) interviews (Sobell et al.