Why does Astrology use the time of birth instead of the time of conception?
Astrology is pragmatic, it uses what is available. Birth time is an observable and well documented quantity – the government records it in its birth registry offices. By nature, conception happens in secrecy – making love in the dark under the bed covers, and actual fertilization of the egg sometime up to 48 hours later inside the woman’s body. A more “esoteric” explanation would be: The child ‘becomes’ a personality of his or her own with the first breath taken in independently from the mother.