Abstract
Determination of work intensity of isometric exercises and mental works from the viewpoint of O2 consumption is not easily accepted, In an attempt to overcome such shortcomings, skin surface lipid metabolism has been examined. As an extention of the preceding effort, in the current study, the changes of the skin surface of the forehead of pregnant women has been analized by use of gas chromatography.
1) The secretion of the fatty acids was quite variable among the subjects, indicating the tendency of great individual differences.
2) Largest mean values among nine fatty acids examined were observed to be C16, C16-1, C18 and C18-1. On the other hand, most frequently appeared fatty acids were C14, C 16 and C18.
3) The composite ratios of fatty acids among those who recorded presence of these FAs, were 54% for C16, 27% for C18, 8% for C18-1, 5% for C16-1, and 5% for C14.
4) The amount of secreted FAs at the post-labour period was found to be about 10 times larger than those at the pre-labour period.
5) Subjects who recorded near 4 hours of pains hours (which is just about the average) showed less secretion of FAs than those whose pains hours were longer and shorter than 4 hours.
6) Subjects whose time of labour were in the afternoon recorded greater amount of FAs than those with their labour in the morning.
7) The changes in the amount of secreted FAs at the time of labour coincided with the general pattern of seasonal changes of FAs secretion.
