The earliest response to successful fertilization

After sexual intercourse, if the sperm and egg can combine, a fertilized egg will be formed. After the fertilized egg implants, women will often experience certain symptoms. For example, the temperature will drop to a certain extent. This is called implantation cooling in biology. In addition, certain changes will occur in the female body, such as softening breasts, feeling more tired, and symptoms of frequent urination and urgency.

1. Cooling

To understand what "implantation cooling" is, you must first understand what implantation is. Implantation refers to the process in which the early embryo of viviparous mammals combines with the mother's uterine wall, thereby establishing a structural connection between mother and child to achieve material exchange. After implantation, the embryo absorbs nutrients from the mother's blood and continues to develop. Implantation is a process of combination that requires preparation and cooperation from both mother and child.

The fertilized egg moves slowly in the fallopian tube (3 to 5 days), and after several consecutive divisions, it forms a morula and enters the uterine cavity, continuing to develop into a blastocyst (called a blastocyst). The blastocyst is surrounded by the zona pellucida and continues to develop by absorbing the uterine milk secreted by the uterine glands. As the blastocyst grows, the zona pellucida swells, becomes thinner, ruptures, and falls off (or dissolves); the embryo escapes from the capsule. The trophoblast cells of the embryo's outer wall are exposed and in direct contact with the endometrium. Implantation is an important step in the early stages of viviparous embryo development.

If your breasts feel tingly, tender, and swollen, you may be pregnant. This symptom may appear within the first few days after conception. If you suddenly don't recognize your breasts, you might be pregnant. Don’t worry!

After your body adjusts to the influx of hormones, this pain will subside and your breasts will no longer feel uncomfortable.

3. Feeling tired

Are you always full of energy, but suddenly feel exhausted?

The surge in progesterone (a hormone) can make you feel exhausted. Almost all pregnant women suffer from this symptom, and you can observe other symptoms to confirm your suspicion.

Have you become a frequent visitor to the toilet? Getting up in the middle of the night to go to the toilet?

If you want to blame someone, blame the little life in your belly! After the fertilized egg implants in the uterine wall, it begins to secrete human chorionic gonadotropin (hCG). If you're tired of getting up in the middle of the night to go to the bathroom, don't worry. Just think of this as training, because in the future, before you know it, your little one will be crying in the middle of the night and saying he's hungry.

5. Do you have any bleeding or cramping symptoms?

In the eight days following ovulation and implantation, you may experience light pink or brown staining, and cramping may accompany this. There may be some spotting during the menstrual period, but this is not a true menstrual period. This is the result of a fertilized egg implanting in the uterine lining.