Secondary sexual characteristic is essential in broodstock management programme in order to develop viable and sustainable aquaculture production.
The morphological and
secondary sexual characteristic differences found in our study were similar to those found by others.
He had poor
secondary sexual characteristic development with no pubic or axillary hair, mild gynaecomastia and a single small left testis.
Mann-Whitney U tests on Food consumption X Race for those girls who experience the presence of a
secondary sexual characteristic, revealed significant differences between the consumption of Lipids U (n = 28) = 36, p = .04; and calcium, U (n = 28) = 36, p = .04; among HA (n = 7) versus AA girls (n = 21), ages 7-10 years, as a function of the presence (1 characteristic minimum) of
secondary sexual characteristics.
Rather, it appears that the cephalic bulge is merely a
secondary sexual characteristic produced as a byproduct of changes in the endocrine system at the onset of sexual maturity.
A biologist could probably give you a much more detailed answer, but the short answer is simply a hormonal imbalance that allows a female deer to produce a
secondary sexual characteristic of a male deer.
INTRODUCTION: Primary amenorrhea is defined as absence of menses at age 13 years when there is no visible
secondary sexual characteristic development or age 15 years in the presence of normal
secondary sexual characteristics.[1] Approximately 30% of patients with primary amenorrhea have an associated genetic abnormality.[2] Turner syndrome (45 X0) is the most common chromosomal abnormality causing gonadal failure and primary amenorrhea.[2, 3] The incidence of gonadal dysgenesis with Turner syndrome is 1:2000 whereas the occurrence of pure gonadal dysgenesis with 46 XX genotype is extremely rare.[1] Yet we came across four patients with gonadal dysgenesis within a short span of time, all from a single village.
The AH method is similar to SM in which concerns the application principle, since it is a
secondary sexual characteristic. In comparison with SM, the AH can only be applied in later stages of maturation, since axillary hair develops after pubic hair and in the presence of higher testosterone concentration.
On physical examination, the patient was phenotypically female, height 178 cm, weight 72 kg, with normal
secondary sexual characteristics (pubic and axillary hair present, breast development Tanner stage IV).
Other clinical findings were gynaecomastia (greater on the right), infantile genitalia, lack of
secondary sexual characteristics, facial atrophy, hyperpigmented knuckles and generalised erythema nodosum.
The evolution of
secondary sexual characteristics is usually the result of a disparity in the parental investment of males and females (Trivers, 1972; Andersson, 1994).
In particular, primary amenorrhea can be diagnosed if a patient has normal
secondary sexual characteristics but no menarche by 16 years of age.