It’s been a week or two since you should have had your period… and nothing is coming! You buy a pregnancy test from a drugstore. After three minutes of waiting, the verdict falls: you are pregnant!
Does exposure to sound influence fetal brain development? And if yes, how? These questions are still without a precise answer within the scientific community.
Recently, experiments with newborn baby mice have shown researchers that sounds seem to alter the wiring patterns of areas of the brain that process sound, much earlier than previously thought. These changes would take place even before the ear canal opens. Published on February 12 in the journal Science Advances, these results could help scientists to identify ways to detect and respond to abnormal wiring in the brain that can cause hearing or other sensory problems.
“As scientists, we seek answers to fundamental questions about how we become who we are.”Said Patrick Kanold, professor of biomedical engineering at Johns Hopkins University (Baltimore, USA). “Specifically, I look at how our sensory environment shapes us and at what stage of fetal development this begins to occur.”, He added in a communicated.
Here, the experiments were carried out in newborn baby mice, whose ear canals do not open until 11 days after birth. In the human fetus, the ear canal opens around 20 weeks gestation. This implies that, in humans, brain changes related to sound would take place at the very beginning of pregnancy.
The study focused on the cortex, the outermost part of the brain, responsible for many functions including sensory perception, and more specifically on the cortical subplate, a particular layer of neurons that will disappear later in the course. development. But before they die, the neurons in this subplate make connections between the thalamus, the brain’s key gateway for all sensory information, and the middle layers of the cortex.
The researchers found here that neurons in the cortical subplate were able to receive electrical signals related to sound before any other neuron in the cortex. They found that sounds could change certain brain circuits at a very early stage of development. In addition, scientists found that while the lack of sound affects brain connections, the addition of sound could also influence early neural connections, and thus influence neurological development.
Thanks to further studies, scientists hope understand how exposure to sound in utero can be important in human development, and how to take these changes into account when having cochlear implants in children born deaf.
1st month of pregnancy: mother’s side
Your body is changing …
This confirms these strange tingling sensation in the breasts. For some, nothing will mar this happiness.
For others, it is the beginning of small inconveniences: nausea, fatigue, irritability, cravings, great sensitivity to odors, excessive salivation …
Read also: The first symptoms of pregnancy
Rest assured, all of these signs are normal. They will disappear at the end of the first trimester. Pregnancy is not an illness.
However, take all the necessary precautions in your daily life: it is during the first three months of pregnancy that all the organs are formed. Avoid the consumption of alcohol, tobacco, raw milk cheeses or undercooked meats.
Also avoid taking certain medications, prescribing x-rays that have repercussions on your baby’s development.
Your moods are changing …
Your emotions are jostling, you ask yourself a thousand questions. You already feel different, and yet nothing can be seen yet.
Don’t announce it too quickly
Do you want to announce that you are pregnant? Patience… Up to two and a half months of pregnancy, the risk of miscarriage is possible. Without being overly concerned, know that this can happen.
To read also: Miscarriage: its symptoms, its causes, its course
1st month of pregnancy: baby side
He grows up…
Your child’s life begins the day a sperm fuses with one of your eggs: ten hours are necessary. Very quickly, this microscopic cell, made for half of you and half of the future daddy, divides. After four days, 148 cells already exist.
The embryo is 4 mm long
At one month of existence, the heart starts to beat… Your baby, who is still just an embryo, measures 4 mm long, its weight has been multiplied by 10,000! It looks like a kind of big comma with a swollen end, the head, and a thinner end, corresponding to the location of the legs and feet.
What is he doing ?
Along with their intense process of division, the few cells that make up the embryo migrate. They start a long journey of 9 days to go up your tubes and settle in the uterus for nine months. The embryo has finally found its nest.
Medical examinations to be performed during the first month of pregnancy
See your doctor soon enough if you have special medical history or if you are taking any treatment.
If this is not your case, you can wait until the second month of pregnancy.
Read also: Beginning of pregnancy: what is the purpose of the early prenatal interview?