With the Lagna, the Sun, Jupiter and the Moon strong in an odd sign and in a Navamsa owned by an odd sign, the astrologer should declare the birth of a male child. If the Lagna and the planets above-named be in an even sign and in a Navamsa owned by an even sign, the birth of a female child is announced. Jupiter and the Sun in an odd sign produce a male child. The Moon, Venus and Mars in an even sign make for a female child. These five planets occupying a Navamsa owned by a dual Rasi and at the same time aspected by Mercury produce twins.