Menarcheal age of blind girls

Kalanghot Padmanabhan Skandhan , Spandana Reddy, Amita Pandya, Sumangala Balakrishnan, Dayani Osuki, Jaya Vasudevan 1 Shri B. M. K. Ayurveda Mahavidyalaya, KLE University, Shahapur, Belagavi-590003, Karnataka, India. 2 Department of Physiology, B. J. Medical College, Haripura, Asarwa, Ahmedabad-380016, Gujarat, India. 3 Institute for Post Graduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar-361008, Gujrat, India.


Introduction
The age at menarche is a developmental milestone which is highly variable and highly sensitive to a variety of internal and external forces Hypothesis of Jafarey et al [17,18] shows the exposure to increased length of the day due to electrification was responsible for earlier menarche among urban girls.Other studies report no difference between menarcheal age of girls in urban and rural areas [12,19].Premature born girls reach menarche 1 year earlier [20].Influence of special sensations, if any, is considered by few researchers [21,22,23].Exposure to visual cues may have a role in activation of hypothalamohypophyseal-gonadal axis.Conclusion is not drawn on any single influencing factor responsible for menarche and thus it is labeled as a multifactorial phenomenon [24].We hypothesize that vision may influence the perception of menstrual phenomenon and thereby effect age of menarche.
In the present study we attempted to find out the effect of light (intact vision) on menarcheal age.

Materials and methods
A total of 110 blind girls in the age group of 15-24 years from three blind schools in the state Gujarat and Bombay city were included in this study.102 normal girls of same age group from a girls' college of same area were included as control group.The study was approved by Institutional Ethics Committee (Ref.No. BJMC/DMER/1982).
Participants were informed about the purpose of the study and the importance of their honesty towards the success of the study.They were assured their identity would not be revealed.Questionnaire was issued to each participant.In the blind schools, one of the investigators or the teacher of the class would read out the questions to the individual participant and answers were recorded.Their age and place of stay i.e. home or hostel was also enquired.Their nature of blindness was enquired whether congenital or developed after birth, if so how many months or years after birth.
Their food habit (vegetarian or nonvegetarian) was recorded.They were asked to give the date, month and year in which the first menstruation was experienced.If not knowing the exact date, they were to give the age of menarche in years and months.Participants were asked whether they were aware of menstrual process prior to menarche and if so, from whom it was learntmother, sister, friend, relative or teacher.What was the feeling when they experienced first menstruationnormal, dirty, messy, frightening or horrifying?At the time of first bleeding whether the participant was staying in the hostel or at home and to whom it was reportedmother, sister, friend, relative or teacher.A question about bleeding pattern was enquired -whether it was normal, profuse or less.Also the participants were to answer if experienced any other difficulties like discomfort or pain in abdomen.Similar questionnaire was issued to participants of the control group.They were instructed to fill and return the form.

Statistical analysis
Data obtained is presented as numbers and mean.Differences in the means were analyzed using independent sample t test.The statistical significance was fixed at p < 0.05.

Results
Participants of control group were day scholars.Out of 110 blind girls 99 were hostellers and remaining were day scholars.Sixty one from study group and all from control group were vegetarian by food habit and remaining (39) were nonvegetarians.Difference in MA was seen considering food habit.50 out of 102 participants of control group were aware of menstruation prior to menarche and their source of information was either mother (n=10), sister (n=16), relative (n=6), friend (n=16) or teacher (n=2).These participants considered the menstrual process as normal when experienced it for the first time.While others (n=52), who did not have prior knowledge on menstrual cycle reported their experience as frightening and horrifying (n=47), or as dirty and messy (n=5).During the process, 47 of them felt slight abdominal pain or discomfort.They first reported their experience to mother (n=64), sister (n=23), friend (n=11) or a relative (n=04).
Forty three participants of study group (n=110) were aware of menstruation prior to menarche.Their knowledge was from mother (n=21), sister (n=09), relative (n=04) or a friend (n=09).They experienced bleeding as normal.Whereas others felt it as horrifying or frightening as well as dirty.At the time of menarche 41 participants of study group were staying in hostel and others were at home.Those who were staying in hostel reported about bleeding to a friend (n=30) or a teacher (n=11), whereas those who were at home (n=69) reported to mother (n=51), sister (n=11) or a relative (n=7).About bleeding pattern 31 of them experienced it as normal and for others as it was profuse or less.
The MA of study and control groups is given in Table 1.Blind girls reached menarche nine months earlier than normal girls.This was statistically significant when compared with that of normal.Role of special sensations, if any, in the initiation of menstruation, was also studied.Two groups of workers did not find any difference in MA among deaf and dumb girls when compared to that of normal [22,23].In the present study we collected details of MA of blind girls which was less compared to that of normal girls in the same study area.
In our society sex education is not imparted at any level.Discussion on topic of sex is not encouraged, especially in front of elders or opposite sex.Our assurance to participants that their names would not be disclosed anywhere at any time, made them more interested and cooperative for this study.Results showed participants of control group (n=52) as well as study group (n=67) were unaware of monthly menstruation.They experienced bleeding as frightening or horrifying.Similar finding was reported in normal girls [37].This situation possibly could have been avoided if they had the knowledge of sex prior to menarche.Sex education should essentially be given systematically by trained teachers.
Our data on MA from 102 girls with normal sight belonging to same age group was 14.5 years (Table 1).Two groups among blind girls, congenital (n=34) and acquired (n=56), did not show any statistical difference in menarcheal age.Blind girls reached menarche 9 months earlier when compared to normal girls (Table 1).This difference was statistically significant.Similar observation was reported by others [21,38].Such difference was not seen by Thomas and Pizzarello [39].
Considering their food habits, vegetarian or nonvegetarian, no difference in MA was noted between study and control group.Similar observation was reported earlier in normal girls [12].
Blindness is found to be associated with an acceleration of menarche [21,40].Age of menarche appears to be related to the severity of visual loss [41].However, we did not observe any statistical difference among blind girls who were blind from birth and those girls who became blind at a later age (Table 1).Girls with total absence of light perception reach menarche earlier (

Table 1 :
Menarcheal age of normal and blind girls [25]tistically significantDiscussionPubertal development in all society is not likely to remain same[25].MA at different places in India is reported from 12 to 15.23 years [

Table 2 :
[49]sler et al[48]in their experimental study observed that some blind people were able to perceive sense of light at visual subsystem and they maintained a normal bio rhythm.Blind girls are under emotional stress.Influence of emotional stress on menarche is not known.Emotional stress is one of the influencing factors for ovulation in normal women[49].No study is done on this line among blind girls.Menarcheal age reported by different authors