If a boy has no testicles, then his body will not go through puberty on its own, but his doctor will have him on a hormone regimen that will cause him to develop just like all the other boys his age, and nobody but the boy and his family will even know the difference.
He needs to visit his doctor first of all and ask for hormone treatment to kick-start puberty. At 16 he should have started so now is the time to seek medical help.
Puberty takes several years from start to finish so most boys have not finished puberty by 16. 18 is the average age to finish.
Hormones are the chemicals which are produced by glands. By definition they pour there secretion/secretions in blood. Blood carry the secretion through circulation to target organ/ organs for desired effect. Usually target organ sends back the message to reduce the secretion of the hormone producing gland. This is called as negative feed back effect. (Like thyroid stimulating orAdrenocorticotrophic hormone by anterior pituitary gland.) Sometimes hormone like Follicle stimulating hormone stimulates ovarian follicle. Which in turn produces hormone estrogen. Main female hormone. Thyroid hormones increase the 'basal metabolic rate' of body.
Hormones are produced and then circulate through the body systemically. The target organ (in this case the Ovary) has receptors that react to the influence of the hormone through direct interaction of the hormone and the receptor. FSH (follicle stimulating hormone) CG (chorionic gonadotrophin) and LH (Leutinizing Hormone) along with progesterone, prostiglandin and estrogen are hormones that create feedback between the pituitary gland (brain) and the ovaries creating the reproductive cycle.
Hormones are produced and then circulate through the body systemically. The target organ (in this case the Ovary) has receptors that react to the influence of the hormone through direct interaction of the hormone and the receptor. FSH (follicle stimulating hormone) CG (chorionic gonadotrophin) and LH (Leutinizing Hormone) along with progesterone, prostiglandin and estrogen are hormones that create feedback between the pituitary gland (brain) and the ovaries creating the reproductive cycle.
Hormones are produced and then circulate through the body systemically. The target organ (in this case the Ovary) has receptors that react to the influence of the hormone through direct interaction of the hormone and the receptor. FSH (follicle stimulating hormone) CG (chorionic gonadotrophin) and LH (Leutinizing Hormone) along with progesterone, prostiglandin and estrogen are hormones that create feedback between the pituitary gland (brain) and the ovaries creating the reproductive cycle.
None, because not all males are drawn to females through puberty or at any other time.
Luteinizing hormone (LH) Luteinizing hormone (LH) secreted by the pituitary gland causes the mature ovarian follicle to rupture, a process called ovulation. -masteringbiology.com
When your body reaches a certain age, your brain releases a special hormone that starts the changes of puberty. It's called gonadotropin-releasing hormone, or GnRH for short. When GnRH reaches the pituitary gland (a pea-shaped gland that sits just under the brain), this gland releases into the bloodstream two more puberty hormones: luteinizing hormone (LH for short) and follicle-stimulating hormone (FSH for short). Guys and girls have both of these hormones in their bodies. And depending on whether you're a guy or a girl, these hormones go to work on different parts of the body. For guys, these hormones travel through the blood and give the testes the signal to begin the production of testosterone and sperm. Testosterone is the hormone that causes most of the changes in a guy's body during puberty. Sperm cells must be produced for men to reproduce. In girls, FSH and LH target the ovaries, which contain eggs that have been there since birth. The hormones stimulate the ovaries to begin producing another hormone called estrogen. Estrogen, along with FSH and LH, causes a girl's body to mature and prepares her for pregnancy. So that's what's really happening during puberty - it's all these new chemicals moving around inside your body, turning you from a teen into an adult with adult levels of hormones.
Some boys can start very late, into their late teens. However, if you are concerned, speak to your doctor about possible hormone issues.
Without some potentially very dangerous hormone treatments you couldn't jump start your puberty early. Your body will go through puberty when it is ready for it. If you feel that there is something wrong with your body and that you should have already started puberty, then you should talk to your doctor. They will be able to examine you and run some tests. If they agree that you need to chemically start puberty, then they will be able to assist you with that.
No, you will have growth spurts through puberty but you cannot control when or how much you have them.
The cycle starts with menstruation. From day 1 to 5 of the cycle, a drop in the level of the hormone progesterone causes the uterus lining to break down (menstruation), it is released as blood through the vagina. From day 6 to 10, The ovaries produce estrogen which will cause the uterus lining to rebuild. Another hormone FSH ( follicle stimulating hormone) produced in the brain (especifically, the pituitary gland) causes one of the follicles in the ovary to mature. A follicle contains an egg cell. From day 11 to 15, the level of estrogen drops and the pituitary gland in the brain produces a hormone called LH (lutenizing hormone), which will trigger the release of the egg cell from the matured follicle (this is called ovulation). From day 16 to 20: the remains of the follicle in the ovary (now called Corpus luteum) will secrete progesterone, which will keep the uterus lining thick, in case fertilization occurs between a sperm cell and the newly released egg cell. From day 17 to 27, the Corpus Luteum breaks down causing a drop in the level of progesterone, which will trigger menstruation and the cycle re-starts.
More or less very boy and girl will go through puberty as it is the process that turns the body of a boy into the body of a man and the body of a girl into that of a woman. The only people who don't go through puberty are a small percentage who are unable to manufacture sex hormones either as a result of a severe illness, castration or a physical accident or abnormality.