At birth, sex difference in the 2:4 digit length ratio is significant only for the left hand. There is also some conflict as to which hand presents the most sexually different 2:4 digit length ratio. In the current study, AGD1, 2, and 3 were measured as the reference to utilize basic epidemiologic data. AGD3 is also called the ano-scrotal distance and appears to be the most reliable and repeatable measurement. AGD3 is the distance from the posterior aspect of the scrotum to the anal verge. Some problems with AGD measurement need to be resolved. However, a study conducted with Caucasian infants reported a significant reduction in AGD in boys with hypospadias (42 control and 77 infants with hypospadias, p=0.002) In another study conducted with 116 adults, a significant positive correlation between AGD and testosterone levels was demonstrated. Presumptive masculinization programming window before 11 to 13 weeks of gestation as in rodents No formal studies have yet reported AGD in patients with complete androgen insensitivity, which would provide definitive proof that fetal androgens determine the longer AGD in human males. In humans, AGD differs by sex boys have a longer AGD than do girls Additionally, numerous studies have shown sex differences in the 2:4 digit length ratio, and males have a lower 2:4 digit length ratio than do females Longer male AGD may be determined by an androgen effect during the Although the two studies were conducted in geographically different places, one in Ulsan and the other in Seoul in Korea (1987), and penile length was measured by different individuals, both studies were conducted with Korean populations and penile length was measured by the SPL technique.
Variable Present data (n=24)đ987 Data (n=49) p-value Changes in stretched penile length and anthropometric data compared with a previous study conducted in 1987 Among the anthropometric measurements of Korean children, there was a significant decrease in height (49.8☑.9 cm), whereas there were no significant changes in body weight (3.2☐.5 kg) or testicular size (1.1☐.4 mL) (Table 1). Compared with the previous study results reported in 1987, there was no significant change in the SPL (p=0.445). The low birth weight group included newborns with gestational age2.5 kg) was 3.3☐.2 cm. Newborn male infants with a gestational age of 38 to 42 weeks and birth weight>2.5 kg were assigned to the NW group (n=24) and those with a gestational age25 kg (NW, n=24). Materials and Methods: Between May 2013 and February 2014, among a total of 78 newborn male infants, 55 infants were prospectively included in this study.
We intended to investigate the current status of penile size and the relationship between penile length and AGD or digit length according to birth weight in Korean newborn infants. Purpose: Anogential distance (AGD) and the 2:4 digit length ratio appear to provide a reliable guide to fetal androgen exposure. Jae Young Park, Gina Lim1, Ki Won Oh1, Dong Soo Ryu2, Seonghun Park3, Jong Chul Jeon, Sang Hyeon Cheon, Kyung Hyun Moon, Sejun Park, Sungchan Parkĭepartments of Urology and 'Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan,2Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, 3Schoo1 of Mechanical Engineering, Pusan National University, Busan, Korea Penile length, digit length, and anogenital distance according to birth weight in newborn male infants
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