Unusual and consistent defects in infertility patients merit attention as these may indicate an
underlying genetic abnormality, in turn necessitating tailored management strategies. We …

Parthenogenesis, a unique form of reproduction, is normally inhibited in mammals and a
human embryo with parthenogenetic origin is not considered capable of producing offspring …

Objective To investigate possible causes of in vitro fertilization (IVF) failure. Design A
retrospective cytogenetic study of human oocytes divided into four groups or, alternatively …

OBJECTIVE: To analyze the genetic composition of oocytes and embryos presenting
abnormal fertilization. DESIGN: Case report. SETTING: In vitro fertilization unit of a university …

Objective: To determine the cause of infertility in a couple whose oocytes failed to mature in
two consecutive fertility treatments. Design: Case report. Setting: University-based IVF …

Objective The purpose of the present study was to investigate if the arrested embryos from a
couple with several previously failed IVF treatments were chromosomally normal. Probes for …

Objective: To describe a case with repeated total fertilization failure due to oocyte defect.
Design: Case report. Setting: University hospital. Patient (s): A patient with repeated total …

Maturation arrest of human oocytes may occur at various stages of the cell cycle. A total
failure of human oocytes to complete meiosis is rarely observed during assisted conception …

Purpose Spontaneous oocyte activation (SOA) is a recently classified phenomenon
characterized by the presence of a single pronucleus immediately following oocyte retrieval …

Objective To define a new category of unexplained infertility and its potential treatment.
Design Normal infertile couples underwent prospectively, cross-fertilization attempts in …