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Microbiome, pregnancy, and lactation

It is never too early to take care of the population of “friendly” microbes that live in our organism: the link between health and these microorganisms (known as “microbiota”) begins in the very early stages of life. Therefore, analyzing their genome (the so-called “microbiome”) can already protect your health during gestation.

The microbiome analysis during pregnancy and breastfeeding can help ensure proper bacterial flora not only for the mother but also for her baby, protecting them from the development of infections and diseases.

The microbiota during pregnancy


Pregnancy is characterized by endocrine, metabolic and immune variations associated with significant changes in the gut microbiota.

Some of these variations are entirely physiological and healthy; their appearance is due to the natural weight gain of the pregnant woman and the need to feed the developing fetus. Other changes could be associated with pregnancy complications or could impair the development of the baby’s gut microbiota.


However, the gut microbiota isn’t the only one that changes during pregnancy.

The vaginal microbiota – important because it helps fight infections – becomes more stable, but its diversity decreases. Lactobacilli species increase and the pH falls.

Any loss of lactobacilli, which have protective functions, can increase the risk of both vaginal and urinary tract infections.

Distinguishing physiological changes from potentially pathological ones is important because:

    • the gut microbiota appears to play a role in intrauterine infections.
    • the intestines of vaginally-born babies are colonized by bacteria present in the mother’s vagina and intestines. It has been hypothesized that in the event of a caesarean section, the absence of this transmission may have long-term consequences on the development of the immune system and on the child’s health, who would be more exposed to the risk of obesity, asthma and celiac disease.

Microbiota and breastfeeding

Breastfeeding is also essential for the development of the baby’s gut microbiota.

During the first year of life, the microbial composition of breast milk changes. Since the microbes present in breast milk come from the gut, it is also crucial to take care of the maternal gut microbiota during breastfeeding.

Why analyze the microbiome during pregnancy?

During pregnancy and breastfeeding, the microbiome analysis with the MICROBALANCE test of the Bioscience Institute helps to identify alterations in the maternal bacterial flora at risk of complications for the mother’s or child’s health.

The collection of the material necessary for the microbiome analysis during pregnancy and lactation is a simple procedure that can be done using the kit provided by the Bioscience Institute.


For more information on the MICROBALANCE test for the microbiome analysis during pregnancy and lactation and to request the collection kit, contact the Bioscience Institute by emailing or fill out the following request form to be contacted without obligation by one of our trusted biologist.

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