antibody that can cross the placenta

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Dr. Steven Hebert answered:

Does the POSSIBILITY of an unborn baby getting antibodies C&D,(Hemolytic Disease of the Newborn) increase with each pregnancy??

HDN

Neonatal
With each pregnancy the mother increases her chances of developing antibodies which can in turn cross the placenta and harm the fetus.
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Dr. Edward Neilsen answered:

what is a placenta?

Connects mom & baby

Uterus
The placenta is the tissue that grows inside the uterus and connects to a developing baby. It is commonly known as "after birth."
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Dr. Ron Eaker answered:

What is the role of placenta in pregnancy?

Many

Placenta
It's primary function is to act as a go between with your system and the baby's. It can filter out bad stuff and let good stuff (nutrients) in. It allows for the proper transfer of everything from calories to antibodies to the baby. A healthy and normally functioning placenta is critical to the baby's health
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What is the definition or description of: CMV antibodies?

IgG and IgM

Placenta
IGM is the early antibody a baby makes when exposed to cmv. It is short lived in the body usuaaly less than 6 months to a year. During this 6 month to one yr the body makes life long immunity antibody IgG in the first six months of life the baby may have materal IgG that passed thru the placenta
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Dr. Usha Mukhytar answered:

How are antibodies transmitted from the mother to the child during pregnancy?

PLACENTAL CIRCULATIO

Placenta
BLOOD CIRCULATION IN PLACENTA
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Dr. Robert Kwok answered:

Might it be that a a mother vaccinated against hep b pass the antibodies on to an unborn child?

Yes

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Antibodies against Hepatitis B virus (HBsAb antibodies from being vaccinated) are transferred from mother to fetus through the placenta. Babies get vaccinated during their first month of life and begin making their own antibodies, which is very important because the antibodies they got from Mom only last about 6 months.
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I asked wrong the first time, for Herpes to be passed through the placenta to the baby, would you have to of contracted while pregnant or just close?

Herpes

Placenta
In order for the virus to pass through the placenta, you have to have "viremia", or virus in your bloodstream. This happens most often during the initial infection when you first contract herpes, before you've built up any antibodies. If you are already a carrier of the virus before pregnancy, then it is unlikely that you will be viremic, and therefore unlikely to cause a fetal infection.
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Dr. Jay Park answered:

Can a mother vaccinated against hep B pass the antibodies on to an unborn child or no?

Yes but...

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The protection provided by the antibodies transferred from mother is short lived and therefore does not replace the regular hepatitis B immunization in infants.
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Dr. Foster P. Carr answered:

Does whatever chemical or antibody that causes a woman's alopecia areata also get into the baby during pregnancy?

Not likely

Baby
Alopecia areata is a cellular autoimmune disease. The mother's killer cells do not cross the placenta barrier and therefore will not attack the hair follicles in the fetus. However, the genes that predispose to alopecia areata are inherited and increase the risk of the child or adult developing the condition in the future.
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Does THC cross the placenta?

Yes

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Yes, THC crosses the placenta. When pregnant women smoke marijuana, there is an increased risk for premature birth and lower birth weight, length and head circumference. Babies that are born prematurely or with low birth weight have higher rates of infant deaths, learning problems or other disabilities.
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