Materials, products and services - the Green Guide Online provides details of the life cycle environmental impacts of construction materials and components, and the Green Book is a free online database of products and services.
Spermicides are used globally for birth control, with or without condoms. As the only means of birth control, spermicides are rarely effective. However, in conjunction with condoms, spermicides are somewhat effective in birth control.
Report Abuse. Sperm don't make a very good DNA sample anyway because a sperm cell only contains half the mans DNA. The full sample can still be obtained because the semen still contains cells that are shed from his urinary tract. If the suspect is on hand they normally use a sample from the inside of his mouth.The only reason semen would be used for a DNA profile is in the case where the suspect left his semen behind (rape, etc).es-it's the seminal fluid, not the sperm alone that contains DNA. You can even get it from a single stand of hair or a swab of saliva. Dafydd Â· 8 years ago.