The present disclosure is directed, in part, to an absorbent article comprising a chassis comprising a topsheet, a backsheet, and an absorbent core positioned at least partially intermediate the topsheet and the backsheet. The absorbent article comprises a central lateral axis, a central longitudinal axis, a first waist edge comprising a first curvilinear portion, a second waist edge comprising a second curvilinear portion, a first side edge comprising a third curvilinear portion, and a second side edge comprising a fourth curvilinear portion, and a core wrap. A masking material may be positioned at least partially intermediate the absorbent core and the backsheet. The chassis has an outer perimeter. About 50% to about 95% of the outer perimeter is curvilinear and about 5% to about 30% of the outer perimeter comprises linear portions.

An umbilical cord cover includes a fluid-tight covering portion defining a cavity, a contact portion around the covering portion, and a releasable adhesive on the contact portion. The releasable adhesive and the contact portion form a fluid-tight seal around the cavity when the contact portion engages a surface.

The present disclosure is directed, in part, to an absorbent article comprising a chassis comprising a topsheet, a backsheet, and an absorbent core positioned at least partially intermediate the topsheet and the backsheet. The absorbent article comprises a central lateral axis, a central longitudinal axis, a first waist edge comprising a first curvilinear portion, a second waist edge comprising a second curvilinear portion, a first side edge comprising a third curvilinear portion, and a second side edge comprising a fourth curvilinear portion, and a core wrap. A masking material may be positioned at least partially intermediate the absorbent core and the backsheet. The chassis has an outer perimeter. About 50% to about 95% of the outer perimeter is curvilinear and about 5% to about 30% of the outer perimeter comprises linear portions.

A front edge of a disposable diaper includes a curved recess recessed rearward in a region including the center of the disposable diaper in a width direction, and a front straight portion extending parallel to the width direction from the outer edge of the recess. A rear edge of the disposable diaper includes a curved projection protruding rearward in the region, and a rear straight portion extending parallel to the width direction from the outer edge of the projection. A pair of first cutout portions is recessed rearward from the outer edge of the front straight portion and recessed inward from the front edge of the outer edge of the disposable diaper. A pair of second cutout portions is recessed frontward from the outer edge of the rear straight portion and recessed inward from the rear edge of the outer edge of the disposable diaper.

A pull-on disposable diaper includes a front side portion; a back side portion; a crotch portion; a waist opening; and a pair of leg openings. An edge portion of the waist opening of the front side portion includes a recessed portion that is recessed in the lengthwise direction toward the crotch portion with respect to an edge portion of the waist opening of the back side portion. A tape member is fixed on a non-skin side surface of the back side portion so as to be extendable toward the waist opening in the lengthwise direction, the tape member being used for fixing the diaper in a small state in the lengthwise direction when the diaper is disposed of. The recessed portion is provided at a position corresponding to the tape member in the lateral direction.

A front edge of a disposable diaper includes a curved recess recessed rearward in a region including the center of the disposable diaper in a width direction, and a front straight portion extending parallel to the width direction from the outer edge of the recess. A rear edge of the disposable diaper includes a curved projection protruding rearward in the region, and a rear straight portion extending parallel to the width direction from the outer edge of the projection. A pair of first cutout portions is recessed rearward from the outer edge of the front straight portion and recessed inward from the front edge of the outer edge of the disposable diaper. A pair of second cutout portions is recessed frontward from the outer edge of the rear straight portion and recessed inward from the rear edge of the outer edge of the disposable diaper.

A pull-on disposable diaper includes a front side portion; a back side portion; a crotch portion; a waist opening; and a pair of leg openings. An edge portion of the waist opening of the front side portion includes a recessed portion that is recessed in the lengthwise direction toward the crotch portion with respect to an edge portion of the waist opening of the back side portion. A tape member is fixed on a non-skin side surface of the back side portion so as to be extendable toward the waist opening in the lengthwise direction, the tape member being used for fixing the diaper in a small state in the lengthwise direction when the diaper is disposed of. The recessed portion is provided at a position corresponding to the tape member in the lateral direction.