women

At the 10th week, we can define whether fetuses right-handed or left-handed.

Getting pregnant and having babies are ones of the most marvelous and sacred things of the nature. In 9 months and 10 days of pregnancy, women’s bodies have to change to adjust the pregnancy and foster fetuses. Even the fetuses experience different developments to prepare for the due day. Therefore, there’ll be interesting things about the changes of mothers and fetuses in 40 weeks of pregnancy, especially fetal unexpected developments.

Interesting things about the conception

The conception happens when a sperm connecting to an eggs. However, it’s surprising to know that that only sperm have to fight against 300 million other sperms along the way from the vagina to the oviduct.

There’re over 300 million sperm taking part in the race of finding the egg but, there’s only 1 of them have chance to get combined to the egg in order to make a conception.

There’re over 300 million sperm taking part in the race of finding the egg but, there’s only 1 of them have chance to get combined to the egg in order to make a conception.

The path that sperms have to go through to get the egg is very hard. In general, the amount of sperm coming out is about two-thirds a teaspoon (about 2-6 mm3); each mm contain 60-150 million sperms whose one-fourths is abnormal, the rest is able to take part in the egg race. In 300 million sperms in semen of an ejaculation, there’re only couple hundreds of eggs and there’s only 1 sperm can get in the egg. The rest is discharged from the vagina or destroyed by the acidic environment of vagina. The other sperms can be swallowed by the cleaning cells in the vagina, go to the wrong oviduct or can’t find the right egg.

24-hour period is the necessary time for a sperm to get into an egg, make the conception happen without your awareness.

1 week is the time the blastocyst need to (the inseminated and divided egg) go to the endometrium and nestle in it (often in the highest part among 3 parts of the uterus). The placental also gets formed up at the stage.

The gender of the fetuses all depends on the X and Y of the father’s sperm. The eggs only have X chromosomes while the sperms have the X or Y ones. If an egg has conception with a sperm contain X chromosome, it will become a female fetus. In the case the egg combines with the sperm containing the Y chromosome, it will become a male fetus. The chance of having baby girls will increase if the copulation occurs in 2 to 3 days before the ovulation. On the contrary, the chance of having baby boys will increase when the copulation occur 1 day after the ovulation. However, those are still comparative; the probability of having exact results is pretty low.

2% is the chance of a twin pregnancy. That could be the twins that look like each other, which happen when an egg combine with a sperm and split in two different zygotes. That often happens randomly. The twins that have different appearances, happening when two eggs get ovulated at the same time and fertilized with 2 different sperms, often happen in families that have history of fraternal twins.      

There’re only 2% women who have twin pregnancy.

There’re only 2% women who have twin pregnancy.

Unexpected developments of fetuses in the first 3 months of pregnancy

In 4th week, an embryo has the size of a little seed.

6 weeks after the conception is the time fetuses have their first heartbeat. At the time, they are as little as a lentil while uteruses start increasing the size, from the size of a big plum to the size of an apple.

In 7th week, fetal brain is divided into 3 separate parts, which is the foundations of the developments of thoughts and actions in the future: the cerebrum is responsible for solving problems, reasoning and storing memories; the midbrain control the strobes from the body to the right brain; the hindbrain control physical activities like breathing, heartbeat and muscle movements. This is also the time embryos are formed and have their first movements shown out by the ultrasound.

In 8th week, the embryos officially become fetuses with heartbeat; the risk of miscarriages is reduced to 2%.

In 10th week, fetuses have the size of a legume but, they have eyes, noses and mouths. 4 limbs with fingers and toes are also grown. They even have nails and the foundations of milk teeth.

Surprisingly, right-handedness and left-handedness are also defined in the period of time, based on thumb sucking. According to a research of Belfast University, fetuses were used to sucking right thumb would become right-handed in the future and vice versa.

The right-handedness or left-handedness is formed when fetuses in their 10th week.

The right-handedness or left-handedness is formed when fetuses in their 10th week.

This is also the moment fetuses can afford the development of communication in the future. If you pat the bump, fetuses will leave the area that is affected by your pat, though; you can’t recognize it. Their heartbeat is around 110-160/minute, twice as fast as ones of their mothers. All the main organs like heart, lung, brain and intestine have had all of their functions and will keep on developing in the next terms of pregnancy.

In 12th week, fetuses are as big as a peach and they can feel the pain in every part of the body, just like infants. Fetal reflections begin developing: if their hands touch their mouth, their lips will open to put the fingers in for the sucking; if their hands touch they eyes, they will blink. At the end of the first term of pregnancy, fetuses are very much like human with chins, broad foreheads, noses and eyelids.  

 

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