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Diagram of stages of developing blastocyst in the human until implantation. There are two stages of migration involved in implantation, the first is the migration of the zygote, and the second is the migration of the trophoblast. [13] Fertilization of the oocyte, takes place in the ampulla of the fallopian tube.
Ectopic pregnancy; Other names: EP, eccyesis, extrauterine pregnancy, EUP, tubal pregnancy (when in fallopian tube) Laparoscopic view, looking down at the uterus (marked by blue arrows). In the left fallopian tube, there is an ectopic pregnancy and bleeding (marked by red arrows). The right tube is normal. Specialty: Obstetrics and Gynaecology ...
Pregnancy is the period of time during which the fetus develops, dividing via mitosis inside the uterus. During this time, the fetus receives all of its nutrition and oxygenated blood from the mother, filtered through the placenta , which is attached to the fetus' abdomen via an umbilical cord .
The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days. [1] During this stage, the zygote divides in a process called cleavage.
After birth, the umbilical cord stump will dry up and drop away by the time the baby is three weeks old. [10] If the stump still has not separated after three weeks, it might be a sign of an underlying problem, such as an infection or immune system disorder. [10]
Around this time, limb movements become more complex, with flexing of the joints and ribs. This activity assists with proper joint development. [ 15 ] Women who have already given birth have more relaxed uterine muscles that are consequently more sensitive to fetal motion, and for them fetal motion can sometimes be felt as early as 14 weeks.
Two-time league MVP Lamar Jackson, who could well be a three-time MVP once this season is a wrap, is very much a threat to statistically be the most efficient quarterback of all time. He currently ...
This begins with the formation of two endocardial tubes which merge to form the tubular heart, also called the primitive heart tube. The heart is the first functional organ in vertebrate embryos . The tubular heart quickly differentiates into the truncus arteriosus , bulbus cordis , primitive ventricle , primitive atrium , and the sinus venosus .