here is some info about the fertility.....
Traditional astrologers divided the signs in fruitful, semi-fruitful and barren signs:
- fruitful (fertile) signs are: Cancer, Scorpio, Pisces
- semi-fruitful (semi-fertile) signs are: Libra, Taurus, Capricorn
- barren signs are: Aries, Gemini, Leo, Virgo, Sagittarius, Aquarius
Beside the division of the signs, the planets have their own division in fruitful, semi-fruitful and barren planets too, just as follows:
- fruitful (fertile) planets are: Moon, Venus, Jupiter, (Moon's) North Node, Neptune
- semi-fruitful (semi-fertile) planets are: Mercury (Uranus?)
- barren planets are: Sun, Mars, Saturn, Uranus (?), (Moon's) South Node"
from what I have been read the 5th and 8th house cusps have to be in fruitful signs, or their rulers have to be in fruitful signs....also for the fruitful planets is the same....there must be more things but this is what I remember...
I think the other members from the forum can help you more.....