Ovulation is the time that a mature egg released from ovary. It is always pushed down the fallopian tube, after this process finished, the fertility is available.
For human females, one egg will develop to mature approximately every month. After migration to the fallopian tube, it is ready to fuse with the sperms.
During this process, the lining of uterus thicked to prepare for the fertilized egg. In the conditions that no conception occurs, the next process, menstruation would occur. Thus, when you are not sure when the ovulation period, you can try to use the Ovulation Test Cassette, and it will gives you a accurate ovulation date. Creative Diagnostics is a professional company in producing such products, we warmly welcome to your kingly inquiry.