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M Taranissi

Publications and source records attributed to M Taranissi.

7 recordsLinked to original sources
PubMed2005

Preimplantation testing for chromosomal disorders improves reproductive outcome of poor-prognosis patients.

The clinical impact of PGD was evaluated through the analysis of the reproductive outcome before and after PGD in the same group of poor prognosis IVF patients, undergoing PGD for chromosomal abnormalities. Based on a series of 2359 PGD cycles, resulting in the establishment of 498 chromosomal abnormality-free clinical pregnancies, the reproductive history prior to PGD was analysed. Of 483 previous pregnancies analysed in patients with 432 pregnancies generated after PGD for aneuploidies, 328 (68%) ended in spontaneous abortions, in contrast to 28.4% after PGD, with only 155 (32%) resulting in deliveries, compared with 71.9% take-home baby rates after PGD. The patients experienced 315 previous IVF attempts, resulting in the transfer of 706 embryos in 308 cycles, of which only 49 (6.9%) implanted, compared with a 34.9% implantation rate observed in the same patients after PGD. Similar analysis of the previous reproductive outcomes of 45 carriers of balanced translocations achieving pregnancies following PGD, showed even stronger clinical impact, with a reduction of spontaneous abortions from 87.8% to 17.8%, and improvement of take-home baby rate from 11.5% to 81.4% after PGD. The results demonstrate a strong clinical impact of PGD, resulting in improvement of implantation rate, reduction of spontaneous abortions and increase in the take-home baby rate.

Abortion, Spontaneous↗
PubMed1995

Late intracytoplasmic sperm injection in unexpected failed fertilization in vitro: diagnostic or therapeutic?

OBJECTIVE: To evaluate fertilization potential of 24-hour-old unfertilized oocytes using intracytoplasmic sperm injection and the pregnancy potential of resultant embryos. DESIGN: Prospective observational study. SETTING: Private infertility clinic, London, United Kingdom. PATIENTS: Fifteen patients with a history of infertility who underwent treatment with IVF and showed failure of fertilization on the day after oocyte retrieval. INTERVENTION: Assisted fertilization with intracytoplasmic sperm injection was carried out at 24 hours after oocyte retrieval. RESULTS: A total of 121 metaphase II oocytes were subjected to intracytoplasmic sperm injection. Of these, 9 were damaged (7%), 2 were polyploidic (2%), and 58 showed normal fertilization (48%). Of the latter, 47 cleaved normally (81%). Forty embryos were transferred and three were cryopreserved. One patient conceived (7%) but in this case only one of three embryos transferred was from intracytoplasmic sperm injection. CONCLUSION: Late (24 hours) intracytoplasmic sperm injection can give good fertilization and cleavage rates but the potential of the generated embryos to achieve pregnancy seems to be low.

Adult↗
PubMed1995

Percutaneous epididymal sperm aspiration and intracytoplasmic sperm injection in the management of infertility due to obstructive azoospermia.

OBJECTIVE: To evaluate the recovery rate of spermatozoa from the epididymis using a percutaneous aspiration technique and to examine the fertilization rate after intracytoplasmic sperm injection. DESIGN: Prospective observational study. SETTING: Private infertility clinic, London. SUBJECTS: Twenty patients with obstructive azoospermia who each had an attempt at IVF. The sperm used for intracytoplasmic sperm injection was retrieved by percutaneous epididymal sperm aspiration in 16 patients. In one patient, microepididymal sperm aspiration was performed in addition because the quality of the sperm obtained by percutaneous epididymal sperm aspiration was not considered suitable for microinjection. In the remaining three patients, neither percutaneous epididymal sperm aspiration nor microepididymal sperm aspiration resulted in the recovery of sperm, which was obtained by testicular biopsy in one of them. INTERVENTION: Assisted fertilization with intracytoplasmic sperm injection. MAIN OUTCOME MEASURES: Normal fertilization and pregnancy rates. RESULTS: A total of 179 eggs were collected and 157 subsequently were microinjected. Normal fertilization occurred in 22 oocytes (14%) and the total number of embryos cleaved was 30. Twelve patients underwent ET in which three conceived (pregnancy rate 25% per transfer). The implantation rate was 10% and failed fertilization occurred in four cycles. CONCLUSION: Percutaneous epididymal sperm aspiration can be used successfully to recover sperm in men with obstructive azoospermia for use in assisted fertilization IVF cycles. The technique is simple, effective, and less traumatic compared with an open microsurgical operation.

Adult↗
PubMed1994

Intramural pregnancy following difficult embryo transfer.

We report an intramural pregnancy following a difficult embryo transfer in a 31 year-old woman, having in-vitro fertilization and embryo transfer for tubal factor infertility. The creation of a 'false passage' at a previous instrumentation of the cervix may be implicated in the ectopic placement of embryos.

Adult↗