Infertility Anovulation IVF Male Factor Tubal Factor Unexplained


Human gonadotrophic hormone (HCG), which is produced by the early pregnancy tissues, keeps the corpus luteum functioning (Q 2.13). HCG is almost identical chemically to LH. It is a surge of LH that normally results in ovulation (Figure 2.3). When there is evidence of follicular development with clomiphene but ovulation or pregnancy do not occur, HCG administration can increase the chance of conception. The HCG should be given when the leading follicle reaches approximately 18mm diameter as visualised by ultrasound.

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