Pregnancy and antidepressants

Pregnancy and antidepressant use involve weighing the benefits of treating maternal depression or anxiety against potential medication risks to the pregnant person, fetus, and newborn.

Placental drug transfer: The movement of substances from maternal blood across the placenta into fetal circulation. Antidepressants differ in how readily they cross the placenta and expose the fetus.
Selective serotonin reuptake inhibitor: An antidepressant class that increases serotonin signaling by inhibiting its reuptake into neurons. SSRIs are commonly considered when medication is needed during pregnancy.
Confounding by indication: Bias that occurs when the reason for prescribing a treatment also affects the outcome being studied. Depression severity can influence both antidepressant use and pregnancy outcomes.
Teratology Information Service: A service that provides evidence-based information about exposures during pregnancy and breastfeeding. These services help interpret medication evidence for a specific pregnancy and exposure.
Pharmacokinetics in pregnancy: The changes in drug absorption, distribution, metabolism, and elimination that occur during pregnancy. Pregnancy can alter antidepressant concentrations and affect whether a dose remains effective.
Sertraline: An SSRI antidepressant used to treat depression and several anxiety-related disorders. Its pregnancy and breastfeeding evidence often informs treatment discussions.
Negative control: A comparison used in research to detect bias or confounding when no causal effect is expected. Negative-control analyses can test whether apparent medication risks reflect family or lifestyle factors.
Pregnancy registry: An observational study that tracks pregnancy outcomes after exposure to a medicine or other factor. Registries collect data on exposures that are difficult to study in randomized trials.
Perinatal depression: Depression occurring during pregnancy or within the first year after childbirth. The illness being treated can affect health and functioning during pregnancy and after birth.
Fluoxetine: An SSRI antidepressant used to treat depression, obsessive-compulsive disorder, and other conditions. Its long half-life distinguishes its exposure profile from several other antidepressants.

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