pregnancy
July 17th 2009 03:24
Your text goes herePregnancy is a unique experience and one that every woman wants to enjoy while doing the best for the unborn baby.Today's new mum is excited to know more about every aspect of pregnancy, birth and new parenthood. Though for every information health care providers and midwive's are available, still the inner excitement of new mum craves for knowing it in advance and such information supplements the advice of their health care provider.
Also the first pregnancy in itself brings some nervousness and anxitey among the new mums so not every mum feels free to ask their queries to health care provider. For all such mums this is the right place.
Fertilization
The beginning of new life occurs at a microscopic level when an egg no larger than a speck unites with a single sperm,the sole winner of a race with several million competitors.
Egg and sperm undergo an amazing journey with several other runners in the race. The the successful sperm on meeting the egg leads to the creation of a single cell containing all the genetic information.Its the unique blueprint that forms the basis of new life.
As the egg and sperm fuse together, the sperm loses its tail and its head enlarges. The egg and sperm form a single cell containing 46 chromosomes of genetic information - 23 from each parent. The inside of the cell swirls around, forcing chromosomes to mingle. In a matter of hours this single cell will duplicate material know as deoxyribonucleic acid (DNA) and split into two. The building blocks of life are now forming.
Conceiving twins and more
Twins occur naturally in about 1 in 80 births, and triplets occur naturally in about 1 in 6400 births. however most pregnancies with three or more fetuses result from treatments for infertility. This is because doctors usually use drugs to stimulate the release of more than one
egg and place more than one embryo in the uterus to increase the chances of successful implantation.
Many more twins are conceived than are actually born. Known as the vanishing twin syndrome, this is when one of the fetuses spontaneously miscarries, usually during the first trimester, and the fetal tissue is absorbed by the other twin, the placenta or the mother, making it seem that the twin has vanished.
Identical or non identical twins
About a third of twins are identical - technically monozygotic - and two thirds are non identical - technically dizygotic twins. Identical twins develop when, as in a normal conception, an egg is fertilized by a single sperm. The fertilized egg then splits into two, causing two separate embryos to develop - if it splits into three, tiplets result, and so on. Identical twins may or may not share a placenta and amniotic sac, but each twin has its own umbilical cord. These babies will have an identical genetic makeup and will be the same sex. They will also have the same hair, eye colour and blood type.
Non identical twins - also called fraternal twins - are produced when a woman releases more than one egg when she ovulates. This could be two eggs from one ovary, or one from each. Each egg is fertilized by a different sperm and two genetically different babies are conceived. They can be the same sex or boy and girl, and will look as much alike or different as any other siblings.
In the case of tiplets, quads and more, there can be any combination of identical and non identical children. For example, three - or four or more - eggs can be fertilized, creating non identical triplets. Or one fertilized egg can split into identical twins with another fertilized egg making it triplet pregnancy with two identical babies and one non identical. Or a single egg can divide into three, thereby creating identical triplets.
The hereditary factor
One factor influencing the conception of twins is your age. After the age of 35, the chances of conceiving identical twins rises. However the chances of conceiving non identical twins rises until about the age of 35 and then drops off. This may be due to the fact that as you age you naturally produce more ovulation - stimulating hormones., which could trigger your ovaries to release more eggs each month.
Your chances of having twins also increase with each subsequent pregnancy, and it seems that larger, taller women are 25 to 30 percent more likely to have them. Non identical twins also may run in families, on hte mother's side. Finally there seems to be an ethnic predisposition: twins or more common in women of african origin and occur least frequently in women of asian origin.
Also the first pregnancy in itself brings some nervousness and anxitey among the new mums so not every mum feels free to ask their queries to health care provider. For all such mums this is the right place.
Fertilization
The beginning of new life occurs at a microscopic level when an egg no larger than a speck unites with a single sperm,the sole winner of a race with several million competitors.
Egg and sperm undergo an amazing journey with several other runners in the race. The the successful sperm on meeting the egg leads to the creation of a single cell containing all the genetic information.Its the unique blueprint that forms the basis of new life.
As the egg and sperm fuse together, the sperm loses its tail and its head enlarges. The egg and sperm form a single cell containing 46 chromosomes of genetic information - 23 from each parent. The inside of the cell swirls around, forcing chromosomes to mingle. In a matter of hours this single cell will duplicate material know as deoxyribonucleic acid (DNA) and split into two. The building blocks of life are now forming.
Conceiving twins and more
Twins occur naturally in about 1 in 80 births, and triplets occur naturally in about 1 in 6400 births. however most pregnancies with three or more fetuses result from treatments for infertility. This is because doctors usually use drugs to stimulate the release of more than one
egg and place more than one embryo in the uterus to increase the chances of successful implantation.
Many more twins are conceived than are actually born. Known as the vanishing twin syndrome, this is when one of the fetuses spontaneously miscarries, usually during the first trimester, and the fetal tissue is absorbed by the other twin, the placenta or the mother, making it seem that the twin has vanished.
Identical or non identical twins
About a third of twins are identical - technically monozygotic - and two thirds are non identical - technically dizygotic twins. Identical twins develop when, as in a normal conception, an egg is fertilized by a single sperm. The fertilized egg then splits into two, causing two separate embryos to develop - if it splits into three, tiplets result, and so on. Identical twins may or may not share a placenta and amniotic sac, but each twin has its own umbilical cord. These babies will have an identical genetic makeup and will be the same sex. They will also have the same hair, eye colour and blood type.
Non identical twins - also called fraternal twins - are produced when a woman releases more than one egg when she ovulates. This could be two eggs from one ovary, or one from each. Each egg is fertilized by a different sperm and two genetically different babies are conceived. They can be the same sex or boy and girl, and will look as much alike or different as any other siblings.
In the case of tiplets, quads and more, there can be any combination of identical and non identical children. For example, three - or four or more - eggs can be fertilized, creating non identical triplets. Or one fertilized egg can split into identical twins with another fertilized egg making it triplet pregnancy with two identical babies and one non identical. Or a single egg can divide into three, thereby creating identical triplets.
The hereditary factor
One factor influencing the conception of twins is your age. After the age of 35, the chances of conceiving identical twins rises. However the chances of conceiving non identical twins rises until about the age of 35 and then drops off. This may be due to the fact that as you age you naturally produce more ovulation - stimulating hormones., which could trigger your ovaries to release more eggs each month.
Your chances of having twins also increase with each subsequent pregnancy, and it seems that larger, taller women are 25 to 30 percent more likely to have them. Non identical twins also may run in families, on hte mother's side. Finally there seems to be an ethnic predisposition: twins or more common in women of african origin and occur least frequently in women of asian origin.
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