Over the years, the Gauquelins collected tens of thousands of birthcharts of parents and children, for their 'Heredity' project, from hospitals around Paris. See here (PDF) for the thirteen different documents, (eight of them published), put up onto the CURA website. This came from a collaboration between Francoise Gauquelin (1929 - 2007) and Patrice Guinard. Earlier, synastry data which amounted to 20,916 parent pairs was posted up (scroll down on the CURA-Gauquelin page to Married Couple data): that group was formed by removing single-parent families and child birthdata, leaving only the couples.
Now, the data for each mother, father and their eldest child has here been combined onto the same line of the database. The different Gauquelin sources of this data have been designated A-M in the first column, to enable data-checking.
The data is in three sections (.txt), here labelled as 'Mom', 'Dad' and 'Kid'. The third of these has a column 'S' or 'D,' for Son / Daughter. We avoid the Gauquelin / Cura notation of 'F' and 'M' which caused confusion between Father / Mother and female / male.
This was done with assistance from Ray Murphy in Adelaide who set up the mother-father pairs of data; Kyösti Tarvainen who has published several studies on this complete synastry-data-set, one with special reference to the eldest child; and then programmer Sven H. provided technical assistance to establish a fault-free selection of the father-mother pairs and eldest child on an Excel database.
This is the world's best synastry database.
The columns give first a sequential number 1-20916 with male or female; then, day, month, year, hour, minute, timezone, latitude and longitude; repeating this for partner and for eldest child.
If any 'Heredity' effect really exists - as the Gauquelins argued for thirty years, as Michel affirmed in two books on the subject, and as too did Francoise in her APP Journal, while others such as Suitbert Ertel (1932 - 2017) were sceptical - then there should be no better data than here presented for evaluating the matter.
The data here given in tabulated text form, can be opened up onto an Excel spreadsheet, and each of the three data-sections separately can go into an astrology program eg Solar Fire, whereby columns of planetary longitudes or house positions etc can be generated for use in synastry research.
Some of the times in the CURA data are given as 24 hours - eg 24 hours, 20 mins, which will not generally work in astrology programs, so these have here been converted to zero hours, adding on one day. The 24-hour times adjusted were, giving the sequential number:
MOM DATA: 2324 => 24:00, 2421 => 24:00, 10717 => 24:00, 11103 => 24:20, 11900 => 24:05, 12231 => 24:20.
DAD DATA: 2554 => 24:00, 10614 => 24:05, 11445 => 24:35, 12059 => 24:05, 20231 => 24:20, 20253 => 24:15, 20309 => 24:00
KID DATA: 878 => 24:00
Some synastry results have been reported in this data, and let us hope that more research into this subject will take place. Thus,
1. Jan Ruis in 1993 analysed a subsection of this data Indication for a Role of Synastry Aspects in a Gauquelin-Sample of 2824 Marriages, Correlation, 12 (2) 20-43, with fairly negative or minimal results.
2. Kyösti Tarvainen reported in 2014 that husbands who had classical Venus-Saturn aspects in their chart were likely to be significantly older (some seventy days) than their partner: the Figure here plots the increment of age by orb; also, that those same aspects in either partner caused the birth of the first child to be delayed by a comparable amount (see Effects of Venus/Saturn aspects in marriages, Correlation 29(2) 2014, 7-14..)
3. N.K. in 2015 working with Ray Murphy found that certain synastry aspects were effectively present in the data: NK, The Chemistry of Attraction (PDF). The graph is here shown of the conjunction of her Sun and his Venus in married couples. For each gender, one can import these columns of data into Solar Fire as a text file (Utilities, Chart import/Export) and thereby transform them into .SFcht files. Then, exporting that as a text file (Open, Send, Export) it will give back a text file, with ecliptic longitudes of whatever planet has been selected.