Conception occurs when a males sperm implants into a females egg. the fertilized egg is then known as an

embryo

Explanation:

Its the start of the baby's cells not quite large enough to be called a fetus. A fetus is when the heart starts to beat

diabetes,smoking,high blood pressure,high cholesterol,obesity,inactivity

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise