You are now 5 weeks pregnant. This is the period when you are become certain on your pregnancy. Now apparently you do not feel any change but there are a number of activities going on inside your uterus. First of all there is a kind of hormone known as progesterone is secreted by the discarded follicle to protect womb lining from shedding. Substantially, there is vascular organ in mammals that unites the fetus to the maternal uterus and mediates its metabolic exchanges this is called placenta; it will secrete progesterone in order to keep the woman pregnant.
There is a kind of pregnancy case, which is known as ectopic pregnancy, even though this case is being detected in a small number of women (about 1 in 200 in the UK), where the fertilized egg starts to develop outside the uterus, usually in a Fallopian tube. It is often detected around this stage but may still become apparent up until 10 weeks.
Development in 5th Week Pregnancy
Now this embryo will have a head end and a tail end. Now all of the building blocks for a baby’s organs will be in there appropriate place. Brain and spinal cord has already started to form into some complete organs. A fundamental circulation systematic has been formed between you and your baby and now your baby has tiny blood vessels in his body (embryo). The embryo is inhaling oxygen through a developing placenta, and the bag of membranes known as the amniotic sac is also developing. This amniotic sac will contain water and this water is known as amniotic fluid in which your baby will be secured and will continue to be nurtured. During this stage the tiny heart is no more than a poppy seed, as compared to the embryo.
Appearance in 5th Week Pregnancy
When the embryo is seen via a microscope it seems as a prawn in shape but still small in size than a grain of rice. Nevertheless the head can be distinguished vividly from the body. At this stage the embryo has a curved back just as letter C, a strip goes down which imply in its shape to the beginning of central nervous system. There is sustaining connection between mother body and the embryo. And the embryo is connected to the mother body by a stalk to the developing placenta.