Is the abnormality in puberty related to the trauma, or, to put it bluntly, the ingestion of hormones from the perp's semen into the child's body?
I found this in a Psychology Today article: "semen also contains two female sex hormones, follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH spurs egg maturation in ovary."
I don't know as I am not a physician (nor pretend to be one on TV). However, I do know that substances (like medications or perhaps hormones) don't work with passing through the gut. Some meds need to be injected and others can be absorbed through the digestive system.
I think from my reading on the matter that the premature sexual stimulation causes SOME children to develop sexually in ways that are premature and left to "normal" development they would not experience sexual maturation that soon. However, I am not familiar with any studies that might indicate otherwise.
Hormones reaching the stomach by way of the mouth would be broken down by the digestive system. However, before they reach the stomach they are exposed to mucous membranes of the mouth and esophagus. Remember that some chemical substances are absorbed through mucous membranes lining the mouth and esophagus. Those who take snuff or smoke pot are aware of this. The active agent in pot smoke and tobacco smoke is absorbed through these mucous membranes. Also there is a range of substances called prostaglandins. These are not technically hormones but they are tissue - activating substances. Prostaglandins are named for the prostate gland, which is of course active in semen formation. Prostaglandins were first found in semen. It is believed that there are other prostaglandin-like substances which have not yet been discovered. These substances also could be absorbed by the mucous membranes in the mouth and esophagus and would play a role in the human reproductive process.
It seems that the tissue hormones introduced into the rectum and colon could also be absorbed through mucous membranes there. As far as I know, no one has studied the effects of these substances on the human body, especially the human child. I'll keep looking for references.
The other matter in the question is why csa (child sexual abuse) sometimes seems to slow down development in boys. In other well-documented cases it seems to speed up development (termed menarche here). I think the answer to this is that csa in early childhood, before puberty, slows down development. However, csa after the time when puberty (menarche) has commenced tends to speed it up. A child under those conditions would seem to mature more rapidly. It needs to be emphasized that there are individual differences and that not all early- or late- developing children were abused. In other words, this symptom taken by itself cannot prove the presence or absence of abuse.
My only qualification for writing about this is that I have an earned doctorate in biological science and I taught human anatomy and physiology for 12 years. The matters touched on here are not discussed in the typical human anatomy and physiology books.
The excellent book I have cited, has excellent references to this subject and a lot of others: Psychological Trauma and the Developing Brain
, by Phyllis Stein and Joshua Kendall.http://www.amazon.com/Psychological-Trauma-Developing-Brain-Neurologically/dp/0789017881/