Why do we prioritize other people's standards.

Asubstitute is standing at the halfway line waiting to enter the match at the next stoppage of play the ball has gone over the touchline for throwing and referee allows for the substitution to substitute wants to take the throw-in does the substitute first have to enter the field of play before being allowed to take the throw-in

Send sperm live for about 48 hours after ejaculation and ovum for only 24 hours after ovulation intercourse can occur after ovulation for fertilization to occur

Summarize four pregnancy-prevention methods. discuss the benefits effectiveness and risks of each