Perinatal

how long does pregnancy typically last?

37-42 wks (“term”) from time of conception to delivery, w/ optimal/typical delivery at 40 wks

when is the 1st trimester

week 0-13

when is the 2nd trimester

week 14-26

when is the 3rd trimester

week 27-40

how long is term?

37+ weeks

how long is postpartum last

0 days to > 2 yrs after delivery

how is respiratory system affected during pregnancy?

Lung capacity ↓ 4-5%

Mechanical obstruction

75% of healthy pregnant women complain of dyspnea on exertion at 31 weeks

how is renal system affected during pregnancy?

↑ total body water (8L); ↑ renal filtration (↑ 40-50%)

hormone driven, begins in 1st trimester

how is Urologic system affected during pregnancy?

↑ urinary frequency

Early- due to hormonal changes & renal hyperfunction

Later- due to mechanical pressure/obstruction

how is GI system affected during pregnancy?

GERD, nausea/vomiting, bloating, constipation

Elevated progesterone

how is done density affected during pregnancy?

decreases

Metabolic changes & diversion of Ca to fetus

how is CV system affected during pregnancy?

HR ↑ all trimesters (70-80 bpm)
BP ↓ until 3rd trimester