Fig. 1From: Is the aging human ovary still ticking?: Expression of clock-genes in luteinized granulosa cells of young and older womenFold change in mRNA levels of genes involved in circadian rhythm in luteinized granulosa cells were normalized to young age. Transcripts encoding CLOCK and PER1 genes are reduced with aging. Each sample contained a pool of granulsa cells from several follicles (young n = 5, old n = 5)Back to article page