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Non-Identical Twins

Updated: Mar 11, 2021

to get pregnant in one baby you have to plan it before, but how about you get two instead of one.

in this article we will talk about the Non Identical Twins, and the reasons behind it:

In general, a woman releases one egg from one of the ovaries in the middle of each menstrual cycle from puberty to menopause, and this process is called ovulation. While many months pass without ovulation, such as the months of pregnancy, ovulation may be disturbed in the first months after puberty, or when the woman gets older or during breastfeeding periods, so months pass without the ovary releasing a single egg, and more than one egg may be released in one month, and the presence of more than An egg is what will lead to an identical twin pregnancy.

How does pregnancy occur with an identical twin?

In certain cases, the ovaries release more than one egg, and this happens for various reasons, such as aging or taking drugs that stimulate ovulation, for example, and as is known, there are millions of sperms in the ejaculate and a few hundred of them can reach the fallopian tube where the eggs are ready for fertilization.

When more than one egg is fertilized in the same month, this will of course lead to the formation of more than one embryo, and these embryos are completely different, as they carry different genes coming from different eggs and sperms, so that the twins are similar as any two brothers are alike, and they may be of different sexes sometimes.

Are there unusual events when pregnant with twins?

Most twin pregnancies end with the birth of two healthy children, but sometimes unusual events occur during fertilization or in the early stage of pregnancy with twins, which leads to unwanted problems, for example, a fetus can succeed in its journey to the uterus and implant in the uterus naturally , While the other fetus fails and remains in the fallopian tube and implants in it, and this is called a migratory pregnancy. It should be noted that the ejaculate must be discarded because its continuation will threaten the safety of the mother, while the fetus in the womb will be saved in most cases.

What are the medical risks during a twin pregnancy?

Pregnancy is not considered a pathology, but rather a normal period in a woman's life. But in some cases, pregnancy is fraught with risks, which calls for close monitoring of the pregnant mother and intensifying visits to detect and treat any problem as early as possible, and some of these cases are related to the mother's age or the presence of a previous disease problem that may affect the course and safety of the pregnancy, and twins pregnancy is one of the These cases. A twin pregnancy greatly increases the risks and problems of pregnancy, as the mother’s blood pressure can rise, and high blood pressure may develop to cause kidney problems and affect the fetus’s growth and may sometimes cause preeclampsia, which is a dangerous and life-threatening condition. The possibility of high blood sugar in cases also increases. A twin pregnancy and high blood sugar will negatively affect the mother and the fetus.

The distances within the uterus are narrow due to the presence of two fetuses instead of one, which may push the placenta to form in the lower piece of the uterus or close to the cervix, and the possibility of a twin pregnancy increases the possibility of the placenta coming apart early and this will lead to a decrease in the amount of blood reaching the fetus and its damage.

On the other hand, the uterus grows a lot and expands, which makes it lose its natural elasticity, so the uterus is not able to contract properly after childbirth and this is dangerous because it is accompanied by profuse bleeding that may threaten the life of the mother. As for the fetus, the fetuses are smaller and the embryos may be born early, which exposes them to many problems of prematurity.

What are the causes of pregnancy with identical twins?

Nobody knows the cause of non-identical twins. Although non-identical twins are born all over the world, they are more common in some ethnic groups, and there are some factors that increase the likelihood of their occurrence:

Genetic factors: Non-identical twins are related to genetics on the mother's side.

• Previous pregnancy with twins, as some women seem to have a tendency to release multiple eggs in one cycle.

• The probability of conceiving an identical twin increases if ovulation is not regular. Ovulation disorders will increase the likelihood of releasing more than one egg, such as pregnancy during breastfeeding or pregnancy at a relatively advanced age.

• The woman's use of drugs that induce ovulation, whether these drugs are oral, or intramuscular injections.

• The occurrence of pregnancy after treating infertility with IVF techniques.

What is the right time for the birth?

In general, doctors do not prefer to wait until the end of pregnancy, and they recommend giving birth between week 37 and 38, during this period the embryos are mature enough to be able to live outside the womb without any problems. Although natural childbirth is possible, many doctors prefer to have a cesarean delivery in cases of twin pregnancies.

It is important to emphasize that a twin pregnancy is a high risk pregnancy, so it is necessary to resort to experienced and competent doctors, adhere to all their recommendations, review the doctor according to the schedule of routine visits, and closely monitor the pregnancy to avoid any complications and treat it as early as possible.


• MedlinePlus: Is the probability of having twins determined by genetics?

•NHS: Pregnant with twins

• UTS: Why are some twins identical and some not?


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