Patient's question:
The period of 15-25 days after conception is the stage of embryonic nervous tissue development; the period of 20-40 days is the stage of cardiovascular development; and the period of 24-46 days is the stage of limb development. Is this correct?What exactly does "after conception" refer to? Does it mean after sexual intercourse?
Doctor's answer:
Hello, conception refers to the fusion of an egg and sperm. Generally speaking, it occurs after sexual intercourse without contraception. Within 7 days after conception, the fertilized egg needs to implant. During the first trimester of pregnancy, it is the period of nervous system development, so it is important to supplement folic acid to prevent neural tube defects. At the same time, the first trimester is also the period of organ development. Generally speaking, the organs of the fetus begin to develop and form during the first trimester. Therefore, prenatal care in the early stages of pregnancy is very important.