The embryo will remain one until the eighth week of pregnancy, when it becomes a fetus. During the First Trimester the placenta and umbilical cord develop. These together bring nutrients to the fetus, and also removes waste from the fetus. The Placenta also releases the Human Chorionic Gonadotropin Hormone (HCG), HCG helps to maintain pregnancy and it affects the development of the baby. The Amniotic Sac also develops, which is a fluid-filled membrane that supports the developing fetus.
The vagina takes the penis during sexual intercourse and also aids as a tube for menstrual flow from the uterus. The cervix is a cylinder-shaped neck of tissue that connects the vagina and uterus. It is also the lower part of the uterus in the female reproductive system. The cervical canal is a passage through which sperm must travel to fertilise an egg cell after sexual
Birth: Around 38 weeks after the fertilisation has happened, the foetus will have developed enough for it to survive outside its mothers body. In most of the cases the babies are born with their head coming out first, but sometimes there are cases where the babies are born with their bottom coming out first and this what call the – breach birth. If there is a problem with a natural delivery then caesarean section is performed. Birth is the end of the foetal stage and the beginning of the infancy. Labour, or the process of birth is divided into three stages, which are: Dilation Delivery of the body Delivery of the placenta Dilation: this is where the strong uterine contractions cause the cervix to dilate until it is wide enough for the mother to bead to pass through- usually about 10 cm.
* A fertilised zygote develops into a blastocyst that secretes human chorionic gonadotrophin (hCG) * hCG maintains the corpus luteum post-ovulation so that the blastocyst can remain embedded in the endometrium and continue to develop * Gradually the placenta develops and produces progesterone (at around 8 - 10 weeks), at which point the corpus luteum is no longer needed Role of hCG in Early Pregnancy 11.4.11 Outline early embryo development up to the implantation of the blastocyst * After fertilisation, the zygote undergoes several mitotic divisions to create a solid ball of cells called a morula (at around 4 days) * Unequal divisions beyond this stage cause a fluid-filled cavity to form in the middle - this makes a blastocyst (at around 5 days) * The blastocyst consists of: * An inner mass of cells (this will develop into the embryo) * An outer layer called the trophoblast (this will develop into the placenta) * A fluid filled cavity (called the blastocoele) * These developments all occur as the developing embryo is moving from the oviduct to the uterus * When the blastocyst reaches the uterus, it will embed in the endometrium
Following an intensive screening and selection process the donor endures a few weeks of invasive medical procedures. First the donor and the woman who will carry the child must coordinate their menstrual cycles. Typically the donor and the recipient take birth-control pills, followed by shots of a synthetic hormone such as Lupron; the combination suppresses ovulation and puts their cycles in sync. After altering her cycle the donor must enhance her egg supply with fertility drugs in the same way an infertile woman does when trying to conceive. Shots of a fertility hormone are administered for seven to eleven days, to stimulate the production of an abnormally large number of egg-containing follicles.
These cells then travel to the lining of the uterus where it then becomes embedded. The collection of cells that are now developing which is now called an embryo that attaches to the cell wall which is called the placenta this then produces a chemical signal which means that the women will not have another menstrual period. Eight weeks after conception the embryo will have grown up to 3 to 4cm it will also have a heartbeat that is recognisable and have features starting to grow this is called a foetus. In the next seven months the organs will continue to grow
4. What is the location of the pubic symphysis Stefan refers to in his story? The pubic symphysis is a midline or secondary cartilaginous joint located between the left and right pubic bones of the median plane. 5. Which adaptation would have taken place in the pubic symphysis of the female skeleton during the later stages of her pregnancy in preparation for the birthing process.
E) What is the location of the pubic symphysis Stefan refers to in the story? Answer: It’s the joint between the two hip bones. It consists of a disc of fibrocartilage. In the later stages of pregnancy a hormone increases the flexibility of the pubic symphysis to ease delivery of the baby. F) Which adaptation would have taken place in the pubic symphysis of the female skeleton during the later stages of her pregnancy in preparation for the birthing process?
Reproductive System worksheet Name: Before answering the questions below, log in to ADAM and review the following Clinical Animations about the Reproductive System a. Conception b. Fetal Development c. Formation of twins d. vasectomy Next, view the clinical illustration a. Ectopic Pregnancy Answer the following questions 1. How is a vasectomy performed? Be sure to cite the specific anatomical structures involved. How does this prevent pregnancy?
Mercedes Kim Mrs. Eckhart Child Development November 2, 2012 Ambiguous Genitalia Male? Female? Approximately one in one thousand babies are born with ambiguous genitalia. This report will explain the birth defect in details and tell what can be done to treat those with this condition. I will also tell you about ways to help to deal with the problems that can go along with this birth defect such as identity problems.