Abnormally sized / shaped sperms, also called as abnormal morphology (Teratospermia) may be one of the factors for recurrent pregnancy loss. Some laboratories do semen analysis and sperm morphology with strict Kruger criteria. You may need to do this because it gives more detailed information about semen analysis and sperm morphology. With Kruger criteria, >14% of normal looking sperms indicate normal semen quality. Genetic testing (karyotyping), DNA fragmentation test and anti-sperm antibodies are other important special blood and semen tests which may need to be done for detail evaluations of recurrent pregnancy loss. Assisted reproductive technology (ART) like Intracytoplasmic sperm injection (ICSI) may be required in your case if natural pregnancy does not succeed. In ICSI, a normal looking sperm can be picked up and utilized for fertilization. You may need to consult an ART centre in near future if normal pregnancy is not successful.