If you have your period on April 27th, and if your period is regular and your cycle lasts 28-30 days, then you will ovulate around May 13th, and you will have a higher chance of conceiving a week before or after this date. If you usually have regular periods, ovulation is usually about 14 days before your next period, and you can arrange intercourse during this time to increase the probability of conception. If your period is not regular, then ovulation may be delayed or delayed, in this case you need to use ovulation test paper to detect urine or ultrasound to monitor the follicles, wait until the detection of mature follicles discharged and then arrange for coitus, which can also increase the probability of conception. The use of ovulation test paper or ultrasound to monitor ovulation, it is recommended to start a week after the menstrual period, to avoid missing the mature follicle discharge.