Ovary and Endometrium
Follicular phase: It begins the last day of the previous menstruation and ends with ovulation, lasting 10-12 days during which follicles in the ovary mature. Follicles, under the influence of FSH and LH, produce estrogen which stimulates rapid growth of the endometrium, vascular proliferation and glandular broadening and lengthening. Once ovaries ovulate, the follicular phase ends.
Luteal phase: It begins with ovulation and ends with the onset of menstruation. Under the influence of LH, ovaries secrete lutein and maintain thickened endometrium for the fertilized egg to implant. If no fertilized egg implants, the endometrium will disintegrate and the cycle ends with menstrual onset.
Basal Body Temperature
In the first half of a menstrual cycle, basal body temperature remains at a lower level (may fluctuate as a result of environmental temperature). After ovulation, it will increase by 0.3-0.6°C and remain at the higher level until the next period begins.
A few days after your period ends, cervical mucus begins to form, first thick and sticky, and then more and more watery. When it becomes transparent, slippery and stretchy just like raw egg white, ovulation is about to occur.
After ovulation, mucus becomes thick and sticky again, and gradually disappears.
A woman ovulates only once and usually only one egg within a menstrual cycle. An egg can survive 12-24 hours, while a sperm 3-5 days. Therefore, the fertility window (or ovulation period) lasts only 6 days within one menstrual cycle. Accurately identifying the ovulation day can speed up your pregnancy.
Physiological Health Management
Shecare can automatically draw the chart of your basal body temperature, and help you determine whether you ovulate, have a potential threatened abortion or have an LPD (Luteal Phase Defeat).