Pregnancy: Pregnancy is accompanied by profound physiological changes. Menstrual cycle ceases for the duration of the pregnancy, which is approximately 40 weeks or 9 months. During that time estrogen and progesterone, which are rise continually. Gestation is traditionally divided into three phases or trimesters, each lasting about 3 months. During this time maternal health and behaviors can affect both fetal and maternal outcomes. First trimester: Dedicated to the development of embryo. By 8 weeks embryonic development is complete and major organs and body systems are differentiated. The embryo is now a fetus. Facial features are evident and external genetalia can be observed. Most importantly, By 8 weeks: Placenta is mature, the umbilical cord is functioning, the circulatory system is well established Placenta become the dominant source of estrogen and progesterone to sustain the pregnancy. By 12 weeks:( @ the end of first trimester) the cardiovascular sy...
Sleep is defined as aroused by sensory or other stimuli . There are multiple stages of sleep, form very light sleep to very deep sleep. Types of sleep: Slow-wave sleep: Most sleep during each night is of the slow-wave variety this is deep, restful sleep that the person experience during the first hour of sleep. Slow-wave sleep is frequently called "dreamless sleep". Sometimes dreams and night mare do occur in slow-wave sleep. But those dreams are not remembered because consolidation of the dreams in memory doesn't occur. REM(Rapid Eye Movement) sleep: Rapid Eye movement sleep occupies 25% of the sleep time in young adults. Each episode normally reoccurs about every 90 minutes . This type of sleep is not so restful , It is usually associated with vivid dreaming with bodily muscle movement. Muscle tone throughout the body is exceedingly depressed, Indicating strong inhibition of the spinal muscle control a...