placental barrier

noun

: a semipermeable membrane made up of placental tissues and limiting the kind and amount of material exchanged between mother and fetus
thiazides cross the placental barrier and appear in cord blood—Resident & Staff Physician

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placental
placental barrier
Placentalia
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“Placental barrier.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/placental%20barrier. Accessed 26 Oct. 2025.

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