The Shettles Method Explained
Dr. Landrum Shettles proposed that Y-sperm (male) are faster but shorter-lived, while X-sperm (female) are slower but more resilient.
- For a Boy: Intercourse should be timed as close to ovulation as possible, when the alkaline cervical mucus favors the faster Y-sperm.
- For a Girl: Intercourse should occur 2-4 days before ovulation. The X-sperm can survive in the acidic environment while waiting for the egg, but the Y-sperm die off.