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Both the embryo and the fetus refer to the baby being born in the womb, the most important being to name the embryo at an early stage of development, the fetus is named later.Pregnancy is counted from the last menstruation. In the first two weeks of pregnancy, ownership is still not conception, the body is just getting ready for the egg to become fertile. The third week is ovulation, and if the egg is fertilized by sperm, the fourth week is ovulation. Fertilized ova are called zygotes and then divergent zygotes are called blastocytes. Blastocyte will be then embriу, when the first stages of the fetal envelope are formed, are usually around the beginning of the fifth week of pregnancy.How long does the embryonic stage last?
Photo: iStock The embryonic stage can be done most of the 4th week of pregnancy by the 10-11. lasts until the week of gestation (week 8 of conception). During this time they evolve the most important organs, the embryonic cell assemblage is increasingly considered "human-made." By the sixth week, the most important bloods are discovered and the heart begins to beat. The primitive brain and the spinal cord also develop during this period. By the 12th week of pregnancy, almost all organs and limbs of the newborn baby have developed. However, the spine and brain continue to develop throughout pregnancy. The unborn baby is approximately 5 cm long at the end of the embryonic stage. Week 12 mr fetus is the official name for a growing baby. Most developmental malformations also occur in the embryonic stage (those that are incompatible with life), so professionals considered to be the most critical period of development. During these weeks, drugs, viral infections, or radiation are the most at risk for development. The risk of spontaneous abortion is also highest in the embryonic stage. It is estimated that at least 25% of pregnancies die at this early stage, often before women become convinced that they are pregnant. (Via) Also worth reading:
- Pregnancy: What happens in the first 9 weeks?
- What's going on inside? - From egg to fetus
- When the embryo is gone