descent

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de·scent

(dē-sent'),
1. Synonym(s): descensus
2. In obstetrics, the passage of the presenting part of the fetus into and through the birth canal.
[L. descensus]

descent

(dĭ-sĕnt′)
n.
1. The process of descending or falling down from a higher position.
2. The passage of the presenting part of the fetus into and through the birth canal.
3. Hereditary derivation; lineage.

de·scent

(dĕ-sent')
1. Synonym(s): descensus testis.
2. obstetrics The passage of the presenting part of the fetus into and through the birth canal.
[L. descensus]

descent

(di-sent′) [Fr. descente, a climb down]
1. An act or instance of moving from a higher place or location to a lower one, e.g., from the testes to the scrotum.
2. Derivation from a common ancestor; lineage; ancestry.
3. In obstetrics, the movement of a fetus through the pelvis during labor and delivery.
See: Cardinal Movements at Birth - step 3