What are the days of infertile period?

The infertile period for women is usually the safe period of the menstrual cycle, which mainly includes the period during menstruation and the five days before and after ovulation. The calculation of the safe period requires comprehensive judgment based on factors such as the regularity of the menstrual cycle, fluctuations in ovulation time, changes in hormone levels, cervical mucus status, and basal body temperature monitoring.

1. Menstrual period:

It is usually difficult to get pregnant within 1-5 days of menstruation. At this time, the endometrium is shed, the follicles are not yet mature, and there is a lack of conditions for fertilized eggs to implant. However, it should be noted that women with extremely short cycles <23 days may experience unexpected ovulation at the end of menstruation.

2. Follicular phase:

It is relatively safe from the end of menstruation to 5 days before ovulation. At this stage, the follicles are still developing and have not yet released mature eggs. However, those with irregular cycles may shorten the safe period window due to premature follicle development.

3. Late luteal phase:

The probability of conception is low between 48 hours after ovulation and before the next menstrual period. The egg survival time is about 12-24 hours, and the fertilization window is closed during this period. However, it is necessary to confirm the exact time of ovulation, as errors may lead to errors in judgment.

4. Hormone fluctuations:

Changes in estrogen and progesterone levels affect the probability of pregnancy. Estrogen is at a low point during the menstrual period and peaks before ovulation. Monitoring hormone levels can help determine the safe period, but it requires the support of professional testing equipment.

5. Physical signs observation:

A rise of 0.3-0.5°C in basal body temperature or thickening of cervical mucus indicates the end of ovulation. Combining the body temperature curve and changes in secretions can improve the accuracy of judgment, and more than 3 cycles of data need to be recorded continuously.

The actual failure rate of contraceptive methods during the safe period is 20%-30%, and it is recommended to use barrier measures such as condoms. The menstrual cycle may be advanced or delayed due to factors such as stress, drugs, disease, etc. There are risks in relying solely on date calculations. To record basal body temperature, you need to measure the sublingual temperature while lying down in the morning. When observing cervical mucus, you should pay attention to the egg white-like stringy changes. Couples with fertility needs can choose ovulation test strips to assist in monitoring. Those with strong contraceptive needs are recommended to use more reliable methods such as compound short-acting oral contraceptives. Maintaining a regular schedule and moderate exercise can help stabilize your menstrual cycle.