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Protein sources diversification and antibiotic growth promoter ban have led to the use of plants. Through production improving, leaves such as Moringa oleifera leaves were often used to ameliorate broilers and layers growth. Attempt to improve egg production led us to undertake this study with 600 day-old ISA Brown chicks (layer-type) divided into three groups (M0, M1 and M2) of 200 birds each. They were reared up to 40 weeks. Daily egg and feed intake were collected to determine laying rate and conversion ratio. Weekly, 30 eggs per group were weighed and broken to determine egg components ratio. At 20 and 40 weeks, 40 birds per group were slaughtered to collect blood, ovarian grape and oviduct. So, total protein, glucose and triglycerides concentrations, ovarian grape weight, oviduct weight and follicles number were determined. Data collected showed higher egg production, heavier eggs and higher triglycerides concentration in M1 compared to M2. High level of triglycerides can be linked to oestrogens synthesis from sterols contained in Moringa oleifera leaves in M1 while high intake of oestrogen substances by hens of M2 reduces their production although antinutritive substances effect on them cannot be excluded.