Conception Chart
Attempts to erect a chart for the moment of conception as the actual beginning of new life has a long tradition in astrology, but even if both partners are certain of the date of sexual union, it is almost impossible to ascertain the exact moment at which the sperm fertilised the egg. However, this has not prevented astrologers from attempting to find a method to do this. The most well-known of these is the so-called Trutine of Hermes or Trutina Hermetis which has been attributed to Hermes Trismegistus (but is now generally considered to have been written in the 10th century by the Arabic astrologer Ja'far Ahmet ibn Yusuf ibn Ibrahim al-dayawhich) which is based on the assumption that the Moon and the Ascendant/Descendent axis in the natal chart are related to those in the hypothetical conception chart. Neither this nor any other method has gained wide acceptance, and for the majority of astrologers the conception chart is considered to be irrelevant.
Steve, I browsed your lilk on Ptolemy's tetrabiblios, interesting.
By a quick search it seems that Ptolemy also used that method and mor erecently Hermes Trismegistus developed another method to estimate the tiem of Conception but I absolutely agree that Sri yukteswar had an edge on that.
http://www.astrogeographia.org/about_us/conception_epoch_chart/mccoy
i pulled this from the internet. Since our Guru Sri Yukteswar used the idea of the conception chart, I am still very interested in this method and how it can be ascertained other than intuitively.
