While Samoa Air's model could prompt a shake-up in the profit-starved industry, many of the world's airlines have so far been reluctant to capitalize on passenger weight because of discrimination concerns.
As it is reasonable to assume that people are more likely to consume diet drinks due to concerns about weight and health, the question is whether this correlated with lifestyles that by themselves were risk factors.
In a survey of over 6, 000 women carried out by the Royal College of Midwives and NetMums last year, 61% said their midwife did not have enough time to discuss their concerns about weight management and nutrition, meaning many women may embark on pregnancy without having discussed how to manage their weight at this important time.