Oceanic lithosphere is continuously formed at a constant rate at the mid-ocean ridges 1 0 = 0. Thus at x = 0 the temperature is the Heaviside step function. Finally, we assume the system is at a quasi-steady state, so that the temperature distribution is constant in time, i.e. T=T(x,z).
Because preeclampsia can prevent proper blood flow to the placenta, babies may be born prematurely and can suffer from later conditions such as learning disabilities, epilepsy and hearing and vision problems.
1 Avoid direct mid-day sun, because pregnant women are more prone to sunburn than non-pregnant women. 2  Drink one eight-ounce glass of water or electrolyte replacement liquid for each hour you are outdoors in hot weather. 3  Avoid vigorous outdoor activities during the hot hours of the day.  Use a high SPF sunscreen.