格 千格 KiloCell

Menstrual cycle tracker

Scientific management menstruation, intelligent prediction of ovulation and physiology stages

Period records

Next period of menstruation
--
Please enter the date start forecast.

April 2026

Period
Ovulation Day
Pregnancy

Depth resolution: How do you manage your biological cycle in science?

Menstruation cycles are a “brainometer” for women's health. A full cycle covers not only menstruation but also hormone-level fluctuations, ovulation and subtle changes in the body systems. You can learn better about your body by tracking the cycle, preparing for pregnancy, contraception or pre-menopausal syndrome (PMS).

1. Four stages of the physiology cycle

  • Menstrual: The first day of the cycle. The endometrium is detached and estrogen and gestationary hormone levels are low. It is recommended that we take more rest and keep warm.
  • Folicular Phase: The period ends before the ovulation. Estrogen levels have risen and the endometrium of the uterus has begun to increase. You'll feel a lot of energy and a lot of good mood.
  • Ovulgation period: Mid-cycle. The ovaries release the eggs, which is the most likely moment of pregnancy. Usually happens on the 14th day before the next menstruation.
  • Yellow Phase: After the ovulation until the next menstruation. The level of pregnancy hormones is rising. If you're not pregnant, the hormone level will drop sharply, triggering PMS. Symptoms (e.g. emotional fluctuations, breast pain).

What is “pregnancy” and “ovulation days”?

The survival time after the ovulation is approximately 12-24 hours, while the survival of sperm in the body can be as long as 3-5 hours. God. So, "pregnancy" usually covers the day before the ovulation, 5 days to the day after the ovulation. God. If you have a pregnancy plan, this stage is critical; If you want contraception, you must take extra precautions on these days.

3. What are the reasons for the non-cyclicality?

Although the average period is 28 days, 21-35 days are in the normal range. Periodic fluctuations may be affected by:

  • Pressure: Over-circumcretion of cortex disrupts the management of hormones in the subcipient.
  • Weight change: Over- and over-lipid fats affect ovulation.
  • Unusual: The lateness and time difference disrupt the biological clock and the endocrines.

Note: This tool is based on mathematical model predictions and is available for reference purposes only. Due to multiple environmental factors, the ovulation is affected by this tool couldn't (c) As an absolute reliable basis for contraception. If there is a cycle of chronic disorders, abnormal bleeding or severe abdominal pain, you must consult a specialist gynaecologist.