Movement KB (Family Planning) such as government programmed an effort to space births and limit the population explosion. One way is to use hormones.
Hormonal contraceptives done by taking pills. These pills are synthetic hormones estrogen and progesterone. The synthetic hormones have an effect on the thickening of the endometrium of the uterus and inhibit the production of LH (Luitinizing hormone) and FSH (Follicle Stimulating Hormone) by the pituitary. When LH and FSH are not produced, then there will be no ovulation (egg cell ripening). Consequently not possible fertilization (conception)
Good hormones and the nervous system associated with the process of delivering information to immunize electrical synapses. While the hormonal system through chemicals called neurotransmitters.
Cooperation between the hormonal system and the nervous system such as shown in the situation which led to a lack of water or dehydration. This situation will be tracked by a particular nerve in the hypothalamus, the pituitary continues. Furthermore, the pituitary produces hormones that inhibit the production of urine antiaeuretika.