Table 7.
Timeline of the critical events in dataset.
| Event | Date | No. in series/Patient number | L number |
|---|---|---|---|
| “New suction gadget” | September 1969 | 43/P35 | 179 |
| Insemination recorded | October 1969 | 50/P42 | 186 |
| Fertilization recorded | November 1969 | 54/P9 | 190 |
| “Excellent” embryos (8-cell, 4-cell) | January 1970 | 64/P50 | 200 |
| First blastocysts | August and September 1970 | 111/P42, | 247 |
| 112/P38, | 248 | ||
| 117/P49 | 253 | ||
| First embryo transfer | December 1971 | 169/P75 | 303 |
| Daily urinary monitoring | March 1972 | 190/P71 | 324 |
| First GIFT | 26 April 1972 | 193/P114 | 327 |
| Luteal support introduced | October 1972 | 211/P107 | 345 |
| Additional cycles monitored before LOR | April 1973 to December 1975 | N/A | L358–472, + 26 patients without L number |
| Regular sperm viability testing for media, serum, oil etc | From July 1973 | N/A | N/A |
| Clomiphene or NC/HCG cycles | January to June 1973, December 1973 | 217–237/P246–P256 | 351–371 380–390 |
| First pregnancy | June 1975 | 312/P38 | 446 |
| Serum monitoring introduced | September 1976 | 377/P28(9) | 607 |
| Hi-Gonavis for LH monitoring | November 1977 | 438/P263 | 665 |
| First live birth | ET July 1977 | 439/P264 | 666 |
ET = embryo transfer; GIFT = gamete intrafallopian transfer; HCG = human chorionic gonadotrophin; LOR = laparascopic oocyte retrieval; N/A = not applicable; NC = natural cycle.