lactaselactating cowlactationlactation curvelactation period methodlactation pregnancy cyclelactogenlactogenesislactoselactose intoleranceladino cloverlarge intestinelatent heatlateral suspensory ligamentleachingleakagelecithinlegumeleguminosaeleptospirosislethallethal geneleucocytesleukocytesleydig celllibidoligninlimousinlinebreedinglinecrossliner classification systemlinkagelinkage genelinkage grouplipaselobelobulelochial fluidlocouslom mangerlong chain fatty acidlong haylongevityloose housing barnlosslounging arealower jawlsignylucerneluteal phase