Related Experiment Video
Updated: Jun 4, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
Published on: May 31, 2021
Comparison of younger and older adolescent females attending birth control clinics
Abstract:
Sexual and contraceptive attitudes and practices were assessed for 486 single females aged 13-20, attending ten birth control centres in Ontario. At last intercourse, 28% were not using any contraception and only 33% reported they had used contraceptives all of the time. Younger adolescents were less likely than older ones to have used effective methods of contraception or to have used contraceptive methods effectively. Younger adolescents expressed greater embarrassment about obtaining oral contraceptives, particularly from the family physician, and were more likely to perceive oral contraceptives as being difficult to obtain.
Related Concept Videos
Birth Control Methods
Cross-Sectional Research
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Infertility in Females
Endometriosis, a condition characterized by abnormal growth of endometrial...
Oogenesis
Hormonal Regulation of the Menstrual Cycle
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.