From which day can I get pregnant after I complete my menstrual cycle?

2 weeks before next. Assuming you have regular, predictable cycles, ovulation occurs around 14 days before your next scheduled menses. Example, if your cycle length (day 1 to day 1) is 28 days, then ovulation is most likely day 14. Sex days 12-15 are best for conception. If cycle is every 30 days, then ovulation likely around day 15/16. Also, consider the use of home ovulation tests to guide you.