Location matters: When a fertilized ovum reaches the uterus, it becomes implanted in the lining of the uterus the endometrium and a pregnancy begins. The hymen is a thin tissue that may either partially or fully cover the entrance of the vagina. Once it has reached day 5 or 6, it breaks out of its membrane covering and is ready to start the implantation process. Bumping up your general level of activity will benefit your sex drive by increasing your energy and sense of well-being. This goal number is fairly consistent with the current average, but should be of concern with our increasingly busy lives. Finally, orgasm leads to the release of yet another hormone, prolactin, that can aid in sleep. It didn't mean there was something wrong with them or that something was missing from their marriages. Once the penis is inside, you can move your bodies so that the penis pushes into the vagina and then pulls partly out again. Once an egg has been fertilized, it undergoes multiple stages of cell division. If you want to try something new, discuss it with your partner, and be open to his or her ideas, too. The more stretchy the hymen is, the less painful the first sex is. For example, while teenage pregnancy may be welcomed in some cultures, it is also commonly disparaged, and research suggests that the earlier onset of puberty. Elevated blood pressure, in turn, is associated with an increased risk of heart disease, stroke, and more. How do you get the penis into the vagina? However, for most people it is still possible to enjoy an active sex life with heart disease. Good sex at any age The need for intimacy is ageless.