It is better to have intercourse after the dominant follicle has been discharged, and the chances of conception are greater when intercourse is performed after discharge.
The follicle diameter is greater than 10mm for the dominant follicle, generally the dominant follicle development to 18 ~ 25mm will occur ovulation phenomenon, but is not absolute, some women develop to the dominant follicle, but not able to discharge normally, in this case intercourse can not get pregnant.
When the dominant follicle develops to more than 18～20mm, it suggests that the follicle has matured, and within 24～48 hours, under the influence of hormones and tension, the follicle will rupture and be discharged, and at this time, if you arrange for coitus, the woman’s chance of getting pregnant is relatively large.
If you want to increase the chances of conception, you can monitor ovulation by means of ultrasound, and if you have ovulation, you can have intercourse on the same day and every other day, and the chances of getting pregnant are higher.
Whether or not you are pregnant after intercourse is determined by a blood test or urine pregnancy test.