1 Transmission: neurons transmit these signals to pain-processing structures of the spinal cord and brain. 2  Modulation: the signals can be amplified or dampened at various points in the pathway to facilitate or inhibit transmission, thereby enhancing or reducing the sensation of pain.
The sperm usually fertilizes the egg in the Fallopian tubes. Then, the fertilized egg moves down to the uterus where it implants, causing pregnancy. The segment of the Fallopian Tube where fertilization commonly occurs is the ampulla..
When does implantation occur is a basic question that every woman trying to get pregnant asks herself. Implantation is a process in which fertilised egg attaches itself to the uterus wall.This process occurs at the beginning of a pregnancy.n this process, once the egg has been fertilised by sperm, it moves through the fallopian tubes and reaches the uterus. Implantation may occur after just a few hours or days after fertilisation. When youâre trying to conceive, the waiting period that comes after ovulation can be quite frustrating and annoying.