Which day is the perfect to get pregnant after menses?

Answer 1

Just before your period starts. A few days before.

You can check when your egg drops by checking your temperature daily with a basal thermometer. Keep a record of your daily temperature on a chart.

A basal thermometer is an ultra sensitive thermometer that tracks your body's minutest temperature shift. A basal body temperature (BBT) thermometer is often used by women to chart their basal body temperature chart and hence predict their fertile period or ovulation.

When your body temperature spikes, you want to plan for sex that night.

Answer 2

In short, any day a woman has sex and doesn't use Birth Control she can fall pregnant - unless a woman is using a method such as fertility awareness method she cannot accurately determine when she is fertile or not.

Typically during an average 28 day cycle a woman will be fertile days 7-16 - ovulation around day 14, there may be a viable egg for up to 48 hours, and a week prior to ovulation where there is fertile quality cervical mucus present which can keep sperm alive for up to 7 days. But again it must be stressed that unless a woman uses FAM she cannot know when she is fertile or not as cycles can change, thus birth control should always be used.