Occupational factors and fertility: the garment worker picture

Research on occupational factors in South Asian fertility has examined several specific work environments that are common across Bangladesh, India, Pakistan, and the diaspora. The evidence is not exhaustive, many occupations have not been studied, but what exists points to specific mechanisms worth understanding.

Garment industry workers: research on Bangladeshi women in the garment industry has found associations between shift work, physical workload, and menstrual irregularity. A separate body of work on garment workers in Bangladesh and Sri Lanka found that work stress and production quotas are associated with hypertensive disorders in pregnancy. These occupations typically involve prolonged standing, variable shift patterns, heat exposure, and high physical and psychological load.

Heat exposure in manufacturing and agriculture: for male workers, sustained occupational heat exposure, factories, outdoor agricultural work, vehicle driving, reduces sperm production. This mechanism is established. For female workers, the evidence on occupational heat and menstrual function is less well-developed but biologically plausible given the temperature-sensitivity of the hypothalamic-pituitary-ovarian axis.

Agricultural workers across South Asia face pesticide exposure that has been associated with endocrine disruption in both female and male reproductive systems. Organophosphates, widely used in Indian and Bangladeshi agriculture, have documented anti-androgenic and oestrogenic effects at occupational exposure levels.

Textile industry chemical exposure (dyes, solvents, formaldehyde in fabric finishing) has been associated with menstrual irregularity and adverse pregnancy outcomes in occupational studies, though confounding factors are difficult to exclude in non-randomised research.

If you work in an environment with chemical exposure and are investigating unexplained infertility or irregular cycles, it is worth including this in your clinical history. Occupational medicine physicians can provide a formal exposure assessment if needed.

For heat exposure: request breaks and rest periods if your workplace is hot, and raise it with HR if heat exposure is a sustained feature of your role. Protective equipment where chemical exposure is involved is a workplace right in most jurisdictions.

Include occupational history in your fertility consultation. The questions are simple: what is your work environment, are you exposed to heat, chemicals, or sustained physical load, and what are your shift patterns. A clinician who has this information can factor it into their assessment.

Shift work and irregular sleep schedules independently affect the reproductive hormone axis, this is not just an industrial issue. Any work that substantially disrupts sleep-wake cycles, night shifts, rotating shifts, very early starts, is worth including in the clinical picture.