Effective Uterine Blood-Flow During Exercise in Normal and Pre-Eclamptic Pregnancies

Effects on fetal and maternal body temperatures of exposure of pregnant ewes to heat, cold, and exercise

“…During mild and moderate environmental heat stress and exercise, fetal thermal inertia and uteroplacental blood flow changes are likely to protect fetal homeothermy, but, like ewes, we expect human mothers to sacrifice fetal homeothermy if the stress threatens their own survival. The threshold above which the human mother abandons the thermal welfare of her fetus may be lower than that of ewes, since, even during light exercise in pregnant women, uteroplacental blood flow is unchanged or decreased (19,23).…”

Considerações Sobre a Atividade Física Na Gestação

“…Segundo MORRIS et alii 23 , durante o repouso, o fluxo sangüíneo às vísceras é excessivo em relação à demanda de oxigênio; por isso, nem sempre há prejuízo significativo quando o suprimento sangüíneo visceral sofre considerável redução em decorrência do exercício. Os dados obtidos por LOTGERLNG et alii 21 sugerem que a disponibilidade de oxigênio para o feto se mantém relativamente constante provavelmente em função da hemoconcentração que resulta da diminuição paralela do volume plasmático durante o exercício materno.…”

Diagnosis of Foetal Asphyxia in Labour

“…Recently various forms of "stress" tests have been studied. Physical activity is known to diminish uterine blood flow (Morris et al, 1956), and following the earlier work of Hon and Wohlgemulth (1961), Stembera (1969) has reported on the effect on the foetal heart rate of exercising the mother. He found that in a group of women with complicated pregnancies, 51 with a normal rate throughout the test had no evidence of foetal asphyxia during labour, whereas in 56 in whom late decelerations appeared during the test there were two stillbirths and a high incidence of intrapartum foetal asphyxia.…”