The Pregnancy Of Pregnancy And Foetal Development

Conception also known as fertilisation is the fusing of two gametes. This creates an embryo which will eventually develop into a baby. All human life begins with conception. A fertile woman will usually produce one egg a month around 2 weeks after the last menstrual period.

Ultrasounds should be performed on expecting mothers to ensure the health of the fetus during the pregnancy. The ultrasounds can be used to make sure that the fetus is meeting the expected growth requirements per trimester. There are 3 trimesters during a normal pregnancy and each trimester has its own growth requirements to ensure that by the time the pregnancy is expected to be over the fetus should be fully developed. The First Trimester is weeks 1-12 of the pregnancy.(10-1) At the end of the first month, the embryo has a heartbeat, a two-lobed brain, and a spinal cord. By the end of the second month, the embryo is recognizable as a human and is called a fetus. After two months, the embryo has started to from arm and legs as well as fingers, ears, and toes. The fetus can be visibly identified as a male or female. By the end of the first trimester, the heart has 4 chambers (1-8). The Second Trimester is weeks 13-28 of your pregnancy.(10-2) By the

Even the language of conception and gestation have been hijacked by politics and religious fundamentalists. All unborn are called “fetuses.” This clearly shows the ignorance of basic human biology. The newly fertilized egg is a zygote --- not a fetus and not a human being. It is a few cells with potential but no distinguishing characteristics and no ability to feel anything. A zygote becomes a blastocyst, which is a zygote that has reached a certain number of cells but has not yet stuck to the uterine walls. Five weeks after conception, snug in the uterine tissue it becomes an embryo. It does not become a fetus until it is ten weeks old and has ears and some facial features. Society laughs at people who call zebras “horses” and yet tolerates the word fetus for zygote, blastocyst and embryo. Getting the language right can help laypeople realize that a zygote or blastocyst is not a baby.

During the first two weeks, the mother is not even pregnant yet. Week 1 is the first week of her menstrual cycle; and during the second week, the ovary releases an egg to flow into the fallopian tube. At this point, the mother can become pregnant and if a sperm makes it to the egg in the fallopian tube, conception begins. At this point, it is called a zygote and has half of its DNA from each parent. During week 3, the zygote makes its

Fetal circulation is the pathway of blood circulation in the fetus (Anderson, 2002). The placenta has an amniotic filled sac attached to it called the amniotic sac. The placenta starts growing in the third week that a woman is pregnant. It starts functioning at four weeks of pregnancy. The normal growth and development of the fetus is the responsibility of an organ of pregnancy called the placenta. The umbilical cord secures the fetus to the placenta. Two arteries and one vein make up the umbilical cord. The placenta links the fetus to the uterine wall of the mother so that the mother and fetus can exchange nutrition and oxygen, as well as eliminating carbon dioxide and other waste products.

Conception: Out of hundreds of eggs and millions of sperm, only one egg and sperm join together at conception. This process takes place in women fallopian tube. The fertilised egg moves to towards uterus to implant in it for next nine months. During this journey, the zygote divides into 12 to 16 cells before reaching the uterus.

During sexual intercourse sperm is ejaculated from the penis and into the vagina. The sperm swim through the cervix and uterus, then finally into the fallopian tubes looking for an ovum to fertilize. After approximately 24 hours the ovum will be fully fertilized. For the next three days the zygote will move down the fallopian tube, growing and dividing quickly. When the zygote reaches the uterus it will attach itself to the endometrium and the pregnancy will begin.

By 5 weeks, the embryo’s liver is producing blood cells. Development of the stomach, esophagus, pancreas, and the small and large intestines is all underway. The permanent kidneys appear by 5 weeks. Next to the kidneys, the gonads, or reproductive organs, are developing. These will eventually become ovaries in the female and testes in the male. The embryo’s endocrine system is also developing. This system of glands regulates the release of hormones throughout a person’s life. The pituitary gland forms at the base of the brain during week 5 and begins secreting growth hormone and the hormone ACTH which stimulates further growth of the adrenal glands. The limb buds continue to grow and by five weeks the embryo develops hand plates. Cartilage formation begins by 5½ weeks. By 6 weeks a portion of the brain called the cerebral cortex appears. Nerve cells, or neurons, in the spinal cord now begin to develop specialized connections. These connections, where neurons meet and communicate with one another, are called synapses. Though a pregnant woman does not feel movement for at least another 8 to 10

There are many different stages of reproduction, and changes that happen in a woman when she becomes pregnant. It may be difficult for some people to comprehend what really goes on in the woman's body while this biological process takes place. Our topic today will help those who have a hard time comprehending the changes a fetus goes through during a pregnancy.

Gestation is the process of development between the first day of the mother’s last normal period and birth, which is calculated to last approximately 40 weeks.3 This means that week one is the female’s period, week two is ovulation, and week three is fertilization.5

Ovulation is the first stage of pregnancy, this is when an egg is released from the ovaries. Every 28 days, cysts are formed on the ovaries; once the cysts burst an egg is released. The egg then starts to travel down the fallopian tubes towards the uterus. Fertilisation

Just like it is in birds the beginning of gastrulation is marked by the appearance of a primitive streak at week two. This occurs within the third week. The primitive streak determines determines the body's midline. During this point the placenta is formed which produces cells that aid in the formation of the embryo. Some cells develop into an outer layer of membranes called the chorion around the blastocyst. Other cells develop into an inner layer of membranes called the amnion. The blastocyst is then considered an embryo. The amniotic sac fills with amniotic fluid. The embryo is within this fluid, floating within

the first step or start of formation is by the outset of fetal folding, the caudal balance of U-tubes intra embryonic grotto artless communicates Around extra embryonic coelom (chorionic break down ). Thwart the lateral folding this message is rapt , and consolidation of 3 layers of the concealed go round on both sides and the primitive umbilical ring is formed. The in the midst accouterment of umbilical vesicle umbilical vesicle gets incorporated within the embryo forming the midgut. With the suggestion of midgut, ventral mesentery and dorsal mesentery the intraembryonic coelom is divided into beloved halves . The dorsal mesentery suspends the special to the footing abdominal barrier, it extends strange the

Now, what about when there is no developing fetus? What does the uterus do then? Well, each month when the female releases an oocyte - which is just an unfertilized egg - that oocyte has the potential to become a baby, but only if it is fertilized by a male's sperm. So each month the uterus prepares for the possibility of fertilization.

When one thinks of pregnancy, the initial thought usually follows a process like this: a man and a woman have sexual intercourse, leading to the man’s sperm fertilizing the woman’s egg. The successful union of a sperm and egg cell is the first cell that eventually develops into a baby. After nine months of pregnancy, the woman hopefully gives birth to a healthy child. Developments in biological technology has led to a new, modern kind of conception: in vitro fertilization.