Gravidez a Partir de Relação Penetrativa por Trás: Sim, Possível

Sexual position does not prevent pregnancy. Rear-entry (posterior) vaginal intercourse deposits semen near the cervical os identically to other positions.

Fertilization Requirements

• Sperm in vagina/cervix during fertile window (5 days pre-ovulation to day of ovulation).
• Viable sperm (motile, morphologically normal).
• Patent fallopian tubes; ovulation.

Position Myths

• Gravity does not prevent sperm ascent (cervical mucus, uterine contractions, sperm motility).
• Female orgasm not required.
• Douching post-coitus does not prevent pregnancy (may push sperm upward).

Contraception

Only consistent, correct use of effective methods (IUD, implant, pill, condom, sterilization) prevents pregnancy. Position is not a method.

If pregnancy undesired, use contraception regardless of position.