The attachment and subsequent penetration by the zona-free blastocyst (usually in the endometrium) that starts five to seven days after fertilisation. insemination Clinical delivery of sperm into the cervical os. Intracytoplasmic sperm injection A variation of in vitro fertilisation in which a single sperm is injected into the inner cellular structure of an egg. Intrauterine insemination Clinical delivery of sperm into the uterine cavity. In vitro fertilisation A technique whereby eggs are collected from a woman and fertilised with a man’s sperm outside the body. Usually, one or two resulting embryos are then transferred to the womb with the aim of starting a pregnancy. Mild male factor infertility The term male factor infertility is used extensively in practice and in the ‘mild’ literature. However, no formally recognised definition of what this means is currently available. Therefore, where the term male factor infertility is applied in this ‘mild’ guideline, it is defined as meaning: two or more semen analyses that have one or more variables which fall below the 5th centile as defined by WHO, 2010, and where the effect on the chance of pregnancy occurring naturally through vaginal intercourse within a period of 24 months would then be similar to people with unexplained infertility or mild endometriosis. Natural cycle IVF An IVF procedure in which one or more oocytes are collected from the ovaries during a spontaneous menstrual cycle without any drug use. Oocyte donation The process by which a fertile woman donates her eggs to be used in the treatment of others or for research. Ovarian Hyper-Stimulation Syndrome (OHSS) An exaggerated systemic response to ovarian stimulation characterised by a wide spectrum of clinical and laboratory manifestations. It is classified as mild, moderate or severe according to the degree of abdominal distension, ovarian enlargement and respiratory, haemodynamic and metabolic complications. Ovulation induction Stimulation of the ovary to achieve growth and development of immature ovarian follicles (ideally monofollicular development) to reverse anovulation or ovulation.
The attachment and subsequent penetration by the zona-free blastocyst (usually in the endometrium) that starts five to seven days after fertilisation. insemination Clinical delivery of sperm into the cervical os. Intracytoplasmic sperm injection A variation of in vitro fertilisation in which a single sperm is injected into the inner cellular structure of an egg. Intrauterine insemination Clinical delivery of sperm into the uterine cavity. In vitro fertilisation A technique whereby eggs are collected from a woman and fertilised with a man’s sperm outside the body. Usually, one or two resulting embryos are then transferred to the womb with the aim of starting a pregnancy. Mild male factor infertility The term ‘mild’ male factor infertility is used extensively in practice and in the literature. However, no formally recognised definition of what this means is currently available. Therefore, where the term ‘mild’ male factor infertility is applied in this guideline, it is defined as meaning: two or more semen analyses that have one or more variables which fall below the 5th centile as defined by WHO, 2010, and where the effect on the chance of pregnancy occurring naturally through vaginal intercourse within a period of 24 months would then be similar to people with unexplained infertility or mild endometriosis. Natural cycle IVF An IVF procedure in which one or more oocytes are collected from the ovaries during a spontaneous menstrual cycle without any drug use. Oocyte donation The process by which a fertile woman donates her eggs to be used in the treatment of others or for research. Ovarian Hyper-Stimulation Syndrome (OHSS) An exaggerated systemic response to ovarian stimulation characterised by a wide spectrum of clinical and laboratory manifestations. It is classified as mild, moderate or severe according to the degree of abdominal distension, ovarian enlargement and respiratory, haemodynamic and metabolic complications. Ovulation induction Stimulation of the ovary to achieve growth and development of immature ovarian follicles (ideally monofollicular development) to reverse anovulation or ovulation.