Related Experiment Video
Updated: May 28, 2026
07:28
Microscopic Replantation of Penile Glans Amputation Due to Circumcision
Published on: June 3, 2022
Penile size in term newborn infants.
Yasemin Akin1, Oya Ercan, Berrin Telatar
1Department of Pediatrics, Dr. Lütfi Kirdar Training and Research Hospital, Istanbul, Turkey.
The Turkish Journal of Pediatrics
|October 11, 2011
Summary
This study established standard penile size in Turkish newborns, finding stretched penile length (SPL) and penile diameter (PD) correlate with height and birthweight. These findings aid in understanding ethnic variations in neonatal penile anthropometry.
Area of Science:
- Pediatrics
- Neonatology
- Anthropometry
Background:
- Establishing normative data for penile size is crucial for neonatal health assessment.
- Previous studies indicate potential ethnic variations in penile anthropometry.
Purpose of the Study:
- To determine standard penile dimensions in healthy, full-term Turkish newborns.
- To investigate the relationship between penile size and other anthropometric measurements.
Main Methods:
- Prospective measurement of stretched penile length (SPL) and penile diameter (PD) in 1217 newborns.
- Recording of birthweight, length, and head circumference.
- Statistical analysis using Pearson correlation and linear regression.
Main Results:
- Mean SPL was 3.16 ± 0.39 cm (95% range: 2.19-4.14 cm).
- Mean PD was 1.21 ± 0.11 cm (95% range: 0.93-1.49 cm).
- Significant correlations were found between SPL and height (p=0.0001), and PD with height (p=0.0001) and birthweight (p=0.002).
Conclusions:
- Neonatal anthropometric measurements are correlated with penile anthropometry.
- Developed formulas predict individual penile length and diameter.
- Ethnic differences in anthropometry may explain variations in penile dimensions across populations.
Related Concept Videos
01:29Penis
The penis serves a dual role in sexual reproduction and urination. It consists of three main regions: the glans penis, the body, and the root, each with distinct functions and unique anatomical features.
Anatomy of the Penis
The glans penis, or the head, is the terminal part of the penis and houses the external urethral orifice, the exit point for urine and semen. Covered by the prepuce, or foreskin, the glans is noted for its sensitivity and plays a key role in sexual pleasure. The body of the...
Anatomy of the Penis
The glans penis, or the head, is the terminal part of the penis and houses the external urethral orifice, the exit point for urine and semen. Covered by the prepuce, or foreskin, the glans is noted for its sensitivity and plays a key role in sexual pleasure. The body of the...
01:19Testes: Gross Anatomy
The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
Each testis is surrounded by the tunica albuginea, a dense connective tissue layer that provides structural support and protection. This layer is covered by an outer serous membrane called the tunica vaginalis, which helps reduce friction...
01:17Male Sexual Response: Erection & Ejaculation
Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
01:15Development of the Sexual Organs in the Embryo and Fetus
Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
01:29Drug Dosing: Infants and Children
Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
01:22Cell Size
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding the cells limits the...
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding the cells limits the...