Fertility Days Online Calculator

- Astrology Pregnancy Prediction

- Lunar Conception Calendar

- Baby Gender Predictor

The method of Dr. Eugen Jonas is based on Soli-Lunar Phase, which is a mutual aspect between Sun and Moon in the moment of birth.Dr. Jonas found that the fertile days are just 2-3 days before the Moon is at the same Soli-Lunar phase as it was at her birth.- If the Moon resides in male (odd) Zodiac Sign during conception, there is a higher probability for birth of a boy.- If the Moon resides in female (even) Zodiac Sign during conception, there is a higher probability for birth of a girl.