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..
Fertilization usually takes place within the fallopian tube, and the zygote begins to divide even as it is being swept toward the uterus.    Fertilization does take place â¦ in the fallopian tubes, the  fertilized egg then travels down to the Uterus wall where it embeds  itself. It is extremely dangerous if the egg embeds itself in the  fallopian tube or develops at this site.