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.
Preeclampsia is primarily noted for raising blood pressure in pregnant women, and eating chocolate helps to lower this risk by up to 69 percent. The study of nearly 2,300 women established greater benefits to those who ate five or more servings per week, especially in their third trimester.