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Multiple pregnancies- Causes & Characteristics

symptoms of twins pregnancy

In the last two decades, the number of multiple pregnancies has increased dramatically, mainly due to the use of fertility techniques. But genetics and the age of the mother also influence.

Multiple pregnancies are one in which more than one fetus develops. This occurs as a result of the fertilization of two or more eggs, or when an egg divides, giving rise in this case to twins, genetically identical.

The twins may be monozygotic, in which case they are identical, or dizygotic. Monozygotic come from a single egg that has been divided into two parts that have continued to develop separately to form two identical, sexually identical and physically very similar babies.

The dizygotic twins, on the other hand, are the result of a multiple fertilization, that is, that the mother had more than one ovule and that these eggs were fertilized by different spermatozoa so that, although conceived at the same time, they are babies Totally different,

symptoms of twins pregnancy
Multiple pregnancies- Causes & Characteristics


that could be of the same sex, or not, and whose physical resemblance is similar to one of the brothers born on different dates.


symptoms of twins pregnancy
Multiple pregnancies- Causes & Characteristics

Although rare and dangerous for both mother and baby, there may also be three, four, five, or even more (this is especially rare). In this case, babies may also be genetically identical, different, or a combination of both types.

In the last two decades, there has been a dramatic increase in multiple pregnancies, mainly due to the extensive use of fertility techniques.

There are several factors that influence the occurrence of a pregnancy of this type:

  • Genetics: The family history of multiple pregnancies increases the chances of recurrence.
  • Late pregnancy: the older the woman is, the greater the chance of double ovulation, especially between the ages of 30 and 35.
  • Previous pregnancies: If the woman has had several pregnancies, the possibility of having twins increases.
  • Fertility treatments: medicines that are given to improve fertility, which stimulate the ovary to produce multiple ovules, and assisted reproduction techniques, in which several embryos (such as in vitro fertilization) are transferred to the uterus, increase Considerably the incidence of multiple pregnancies.

Multiple pregnancies are considered high risk for both mother and fetus. When there are more than two embryos, especially from four, parents are sometimes advised to reduce embryos, which is to inject a substance into one or more embryos to eliminate them and thus facilitate the viability of the rest. The best thing, however, is to avoid a large number of embryos so as not to have to resort to this measure; For example, not implanting more than two fertilized eggs in the uterus when using the in-vitro method.

Characteristics of multiple pregnancies

Twins, twins, triplets … How are the multiple pregnancies?

Although they do not differ much from the pregnancies of a single baby, the multiple pregnancies, of twins, twins or triplets, are often characterized because discomfort, such as nausea or contractions, is usually felt before a single pregnancy that the future moms must take into account.

Among the main characteristics that identify the multiple pregnancies we have:

  • Tiredness: The sensation and need to sleep as well as fatigue is much greater in multiple pregnancies.
  • Need to urinate: The pressure on the bladder is greater, therefore, the need to urinate increases.
  • Constipation: This discomfort is common in all pregnancies because the digestive tract becomes slow.
  • The presence of anemia: In multiple pregnancies, this is caused by the demand for iron by both mother and baby. Lack of iron causes tiredness, dizziness, dizziness, tachycardia, languor.
  • Back pain is greater because of the babies’ weight.
  • The presence of hypertension and edemas, produced by stress or anxiety.
  • Blood loss is common in multiple pregnancies, although the causes are still unknown. In this situation, go to the doctor as soon as possible.

Related: Vitrification of eggs: a good idea to preserve your fertility

  • In multiple pregnancies, weight gain is greater. In a twin gestation, the increase can be 14 kilos, while in one of the triplets can exceed 16 kilos. It is important to keep a healthy diet controlled by a professional.

Related: Care to be taken in the first trimester of pregnancy

  • Insomnia: The conciliation of the soil is usually more difficult towards the end of multiple pregnancies due to the weight of the belly since it is difficult to find a comfortable sleeping position.
  • The presence of previous contractions: they are irregular but should not be confused with the regular and painful contractions.
  • Typical single-pregnancy pregnancy lasts approximately 40 weeks, a twin pregnancy usually lasts between 35 and 37 weeks.

Also Read: The safest sleeping position during pregnancy

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