الكاتب: Multiple References

Data of 276 collections in a commercial embryo transfer center were analyzed retrospectively, in order to study the effectiveness of 5 different commercial gonadotrophin preparations in Holstein donors. Superovulation treatments varied according to the drug used: A) Folltroopin (Vetrepharm Inc, Canada), batch 12lA-twice daily constant dose injections over 4 d for a total dose of 20 mg PPFE (400 mg NIH-FSH-PI); B) FSH-P (Schering Inc, USA) batch 596A90-twice daily decreasing dose injections over 4 d for a total dose of 48 mg Armour; C) FSH-p Laborclin (Lab Laborclin, Brazil) batch 01/91-twice daily decreasing dose injections of 48 mg Armour; D) FSHp Altrin (Antrin, Japan) batch 5 12241-twice daily decreasing dose injections of 48 mg Armour; E) Folitropina (Lab Elea, Argentina) batch E6017-twice daily decreasing dose injections for a total dose of 48 mg Armour. All treatments were started between Days 10 and 13 of the estrous cycle. Estrus was induced with PGF,, (Delprostenate; Ono Pharma, Japan) injected 48 h and 60 h after beginning of treatments. All donors were artificially inseminated with frozen semen twice at 12 h intervals following onset of estrus. Donors were rectal palpated prior to embryo recovery to estimate the number of CL. All collections were made between Days 6 and 8 after estrus. Data were analyzed by least squares method. Results obtained are shown in table 1.