Intl. J. of Molecular Zoology, 2013, Vol.3, No.2, 4
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Table 2 The mean diameter of colloid and epithelial cell height of thyroid during different phases of pregnancy
Early pregnancy
Middle pregnancy
Late pregnancy
Large
follicle
Medium
follicle
Small
follicle
Large
follicle
Medium
follicle
Small
follicle
Large
follicle
Medium
follicle
Small
follicle
Diameter of
colloid (
µm
)
96.0
56
28
64
40
28
72
60
36
Epithelial cell
height (
µm
)
3.6
4
12
4
8
12
4
8
8
Figure 2 The cuboidal epithelium showed in different stage of
pregnancy
Note: A: Large follicle during early pregnancy showing low
cuboidal epithelium; B: Medium size follicle during early
pregnancy showing cuboidal epithelium; C: Small size follicle
during early pregnancy showing high cuboidal epithelium; D:
Large follicle during mid pregnancy showing low cuboidal
epithelium; E: Medium size follicle during mid pregnancy
showing cuboidal epithelium; F: Small size follicle during mid
pregnancy showing high cuboidal epithelium; G: Large follicle
during late pregnancy showing low cuboidal epithelium; H:
Medium size follicle during late pregnancy showing cuboidal
epithelium; I: Small size follicle during late pregnancy showing
high cuboidal epithelium
Figure 3 The mean diameter of colloid and epithelial cell height
of thyroid during different phases of pregnancy
1.4
plasma concentration of thyroid hormone
The thyroid hormone examined during different stages
of reproductive cycle of bat
taphozous kachhensis
are
described below.
The thyroid hormone shows marked seasonal variations.
During early pregnancy there is rise in the level of
TSH (1.7 ng/mL) but the slight decrease in the level of
T3 (54 ng/mL) and T4 (2.9 ng/mL) was noticed. The
level of TSH and T4 was decreases during mid
pregnancy but the increase in the level of T3 was
noticed and it is highest as compare to other stages
and it is found to be 1.4 ng/mL, 1.5 ng/mL, 69 ng/mL
respectively. During late pregnancy, TSH and T3
concentration decreases but the increase in the level of
T4 was observed and it is found to be 0.9 ng/mL, 60 ng/mL,
2.9
ng/mL respectively (Table 3, Figure 4).
Table 3 Hormonal concentration of Thyroid hormone and TSH during various phases pregnancy
Concentration of hormone (ng/mL)
Reproductive period
TSH
±SEM
T3
±SEM
T4
±SEM
Early pregnancy
1.7
±0.13
54
±1.80
2.9
±0.14
Mid-pregnancy
1.4
±0.12
69
±1.91
1.5
±0.05
Late-pregnancy
0.9
±0.09
60
±1.28
2.9
±0.11