Trimester

Number of Week

Keratinized stratified squamous epithelial tissue

Non-Keratinized stratified epithelial tissue of mucous

Muscular Membrane

Lip Gland

Height

Width

M ± SD

III

16

74.2 ± 21.6

28.7 ± 9.7

135 ± 17.6

103 ± 15.0

135 ± 17.6