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..
Once healthy sperm has reached an egg then fertilization can immediately occur. It usually roughly takes 90 seconds for the sperm to reach the egg and can be found in the fallopian tubes within five minutes.fter fertilization occurs, implantation begins to occur as the egg travels through the fallopian tubes to the uterus where the zygote will begin to form and grow into a baby. This process can take up to four days to complete and reach itâs expected point.