What should I do if I miss a pill progestogen-only pill? If your average menstrual cycle is 35 days ovulation happens around day 21 and your most fertile days are days 19,20 and Using contraception effectively Will antibiotics stop my contraception working? Knowing when you ovulate can help you plan for sex at the right time and improve your chance of getting pregnant. Find out more about getting pregnant.
Understanding your menstrual cycle
Decisions about pregnancy Deciding to get pregnant is perhaps the most important decision a couple can make. Find out more about emergency contraception , including where to get it from. Perhaps it's easier for them to make the journey if they don't have to swim up—and can just swim horizontally.