Throughout the9 months of pregnancy, the fetus keeps on growing in size until it is fully developed as a human: from a zygote to a baby. At the same time, the body of the pregnant woman and the symptoms that accompany her during pregnancy change month after month as fetal development pro...
What is a Fetus? Afetusis a human baby developing in the womb from week eleven until birth. Prior to week eleven, a developing baby is known as anembryo. The baby is known as a fetus for the majority of its development in the womb. ...
During pregnancy, a woman’s heart must work harder because as the fetus grows, the heart must pump more blood to the uterus. By the end of pregnancy, the uterus is receiving one-fifth of a woman’s prepregnancy blood supply. During pregnancy, the amount of blood pumped by the heart...
For example, the placenta produces human chorionic gonadotropin, a hormone that prevents the ovaries from releasing eggs and stimulates the ovaries to produce estrogen and progesterone continuously. The placenta also carries oxygen and nutrients from mother to fetus and waste materials from fetus to ...
Figure 16.A 37-mm crown-rump-length human fetus, approximately 9 weeks old. (Courtesy of A. Burdi, Ann Arbor, Mich.) Sign in to download full-size image Figure 17.A 3 ¾-month-old human fetus (130-mm crown-rump length).
of cells, an inner cell mass that will give rise to the fetus, and trophectoderm cells that will give rise to the chorion portion of the placenta. The other portion of the placenta is formed from the allantois that will develop as a projection from the hind-gut. The blastocyst will ...
Spector GJ.Later stages of development of the periotic duct and its adjacent area in the human fetus.Laryngoscope,1980;90 20(Suppl)∶21Spector GJ, Lee D, Carr C, Davis G, Schnettgoecke V, Strauss M, Rauchbach E (1980) Later stages of development of the periotic duct and its adjacent...
Fetus Growth Stages | Overview & Progression Prenatal Development Lesson Plan Human Gestation | Overview, Period & Length Amniotic Sac | Definition, Function & Parts Stages of Pregnancy: Physiological Changes & Regulating Hormones Fertilization & Implantation: Process & Physiological Changes Create an acco...
Fetus Growth Stages | Overview & Progression Prenatal Development Lesson Plan Human Gestation | Overview, Period & Length Amniotic Sac | Definition, Function & Parts Stages of Pregnancy: Physiological Changes & Regulating Hormones Fertilization & Implantation: Process & Physiological ChangesCreate...
Of course, these stages are very generalized and vague, so we can identify twelve more specific stages of human life. The more specific stages can be classified as: 1) Pre-birth or fertilized egg stage, which includes the transition of the embryo to a fetus. ...