An absorbent and disposable undergarment comprising: a liquid permeable topsheet (11)； a liquid impermeable backsheet (12)； a liquid absorbent core (13) between the top sheet and the back sheet； a laminate comprising the top sheet, the back sheet and the core, and having a front section (7), a rear section (8) and a crotch section (14) interposed between the front section and the rear section； first and second edges (15) of leg openings, in the form of generally circular arc-shaped cuts on transversely opposite sides of the crotch section； stretchable elastic elements (16, 17, 18) that generally extend along each of the first and second edges that define the leg openings； comprising the first and second elastic elastic elements (16a, 16b) of the front half, which extend mainly along the first and second front halves (14a) of the first and second edges that define the leg openings, first and second elastic parts (17a, 17b) of the rear half, which extend mainly along the first and second rear halves (14b) of the first and second edges that define the leg openings, and first and second elastic parts (18a, 18b) of core shaping, which extend longitudinally on transversely opposite sides of the crotch section, wherein said first elastic part (18a) of core shaping does not intersect with any of said elastic parts (16a , 17a) of the first front half and the first rear half, and wherein said second elastic core forming part (18b) does not intersect with any a of said elastic parts (16b, 17b) of the second front half and the second rear half, characterized in that said first elastic part (18a) of forming the core extends longitudinally beyond the crotch end of the elastic parts ( 16a, 17a) of the first front half and / or the first rear half, and the second elastic core forming part (18b) extends longitudinally beyond the crotch end of the elastic parts (16b, 17b) of the second front half and / or the second rear half.Una prenda interior absorbente y desechable que comprende:
